An object is thrown off a bridge horizontally at 10 m/s. What is the magnitude of the velocity when it hits the water 5 seconds later
Answers
The object was thrown horizontally, its horizontal velocity remains constant at 10 m/s. Therefore, the magnitude of the velocity when it hits the water is also 10 m/s.
When an object is thrown horizontally, its vertical velocity remains constant due to the absence of any vertical force.
Assuming the acceleration due to gravity is approximately 9.8 m/s², we can calculate the object's vertical displacement using the formula:
s = ut + 0.5 * g * t²
where
s = vertical displacement,
u = initial vertical velocity (0 m/s as the object is thrown horizontally),
t = time (5 seconds),
g = acceleration due to gravity (9.8 m/s²).
Substituting the values into the formula:
s = 0 * 5 + 0.5 * 9.8 * (5)²
s = 0 + 0.5 * 9.8 * 25
s = 0 + 122.5
s = 122.5 meters.
Thus, the object's vertical displacement when it hits the water is 122.5 meters.
Since the object was thrown horizontally, its horizontal velocity remains constant at 10 m/s. Therefore, the magnitude of the velocity when it hits the water is also 10 m/s.
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Related Questions
Declaration of Independence --- Articles of Confederation--- _________________________ -- U.S. Constitution The events above are in chronological order – what event below should be in the blank? a The Boston Tea Party b The Constitutional Convention c The French & Indian War d Both Boston Tea Party and The French and Indian War are correct
Answers
Answer:
b. The Constitutional Convention
Explanation:
The given events in its chronological order :
1. Declaration of Independence ---- 4th July, 1776.
2. Articles of Confederation ---------- 15th November, 1777
3. The Constitutional Convention ---- 25th May, 1787
4. U.S. Constitution ------------------------ 17 September, 1787
The U.S. Constitutional Convection took place in the year 1787 from 25th May to 17th September. It took place at the Pennsylvania State House situated in Philadelphia. The Constitutional Convection of the United States was chaired by George Washington.
part a. A nerf dart is launched out of a pvc pipe, and while it is accelerating it goes from rest to a velocity of 30.00 m/s. The acceleration of the dart is 330 m/s^2. How long is the dart being accelerated?part b. How far does the dart travel being accelerated?
Answers
Part A. We are given that a dart travels from rest to a velocity of 30 m/s with an acceleration of 330 m/s^2 to determine the time we will use the following equation of motion:
\(v_f=v_0+at\)Where:
\(\begin{gathered} v_f,v_0=\text{ final and initial velocities} \\ a=\text{ acceleration } \\ t=\text{ time} \end{gathered}\)Since the dart is launched from rest this means that the initial velocity is zero, therefore:
\(v_f=at\)Now, we divide both sides by "a":
\(\frac{v_f}{a}=t\)Now, we plug in the values:
\(\frac{30\frac{m}{s}}{330\frac{m}{s^2}}=t\)Solving the operation:
\(0.09s=t\)Part B. Now, we are asked to determine the distance. To do that we will use the following equation of motion:
\(2ad=v_f^2-v_0^2\)Now, we divide both sides by "2a":
\(d=\frac{v_f^2-v_0{}^2}{2a}\)Now, we plug in the values:
\(d=\frac{(30\frac{m}{s})^2}{2(330\frac{m}{s^2})}\)Solving the operations we get:
\(d=1.36m\)Therefore, the distance is 1.36 meters.
is toasting a piece of bread an example of a physical or chemical change?
Answers
Toasting a piece of bread is an example of a chemical change. It can't be reversed that's why it is irreversible.
During toasting, the heat causes a chemical reaction in the bread known as the Maillard reaction. This reaction occurs between the amino acids and the reducing sugars in the bread, which results in the formation of new compounds, including melanoidins, which give the bread its characteristic brown color and flavor.
Furthermore, toasting also involves the evaporation of water from the bread, which changes its texture and makes it crispier.
Therefore, toasting a piece of bread involves chemical changes in the bread's composition, resulting in the formation of new compounds, which is why it is considered a chemical change.
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A small engine causes a 2-kg model car to accelerate at a rate of 5m/s2. What is the net force on the model car
Answers
Answer:
10N
Explanation:
ΣF = ma
ΣF = (2kg)(5m/s^2)
ΣF = 10N
MARKING BRAINLIEST: A 75.0 kg person rides up and down in an elevator that starts from rest, accelerates from rest to 2.0m/s in 2.0s, continues at a constant velocity of 2.0m/s for 2.0s, and then comes to a stop from 2.0m/s in 2.0s. Calculate what the scale would read in each of the following situations. Show all work including free-body diagrams. Round off g to 10 m/s2.
Answers
A person located on the equator is orbiting the center of the Earth to the East at 1670 km/s.
Relative to the center of the Earth, a person on the North Pole is
A) moving at the same velocity to the East, since they are both on the same planet in space.
B) moving toward the South at the same velocity.
C) not moving at all.
D) stationary, except spinning in-place once per day
Answers
Moving at the same velocity to the East which means that they are both on the same planet in space.
Movement and velocity of planetRelative to the center of the Earth, a person on the North Pole is moving at the same velocity to the East because both are present on the same planet in space.
The whole planet of earth spins in the same direction as well as with the same velocity so we can conclude that option A is the correct statement about direction and velocity of the earth.
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What's the net fore and gravity
Answers
Answer:
Force = Mass x Acceleration. Since the acceleration of gravity is always constant at 9.81 m/s2, the force of gravity is constant as well, according to Newton. If the object is sitting motionless on the ground, then the net force (sum of all forces) acting on it is zero
Explanation:
sorry if it doesn't help
an object has a mass of 4kg and an average acceleration of 10m/s/s what is the force
Answers
Force = 4kg x 10m/s^2
Force = 40N
I need help with my homework please? I will give a lot of points and a brainlist.
Answers
Answer:
1. False
some metals are ferromagnetic
2.True
3. True
4. True
5. False
The strength of electromagnetic can be increased by increasing the number of wire around it
#1
FalseVery few like Fe,Ni ,Co are ferromagnetic.
Most are para magneticSome are dia magnetic#2
True
#3
True
#4
It's Orsterd experiment conclusion
True#5
FalseBecause
\(\sf B=\mu_o nI\)
If you decrease no of turns magnetic force decreases
If we were to double the radius of the wire and re-suspend the weight, which of the following would be correct.A)The strain experienced by the wire would increase by a factor of 4.B)Young's modulus would increase by a factor of 4.C)The stress experienced by the wire would decrease by a factor of 4.D) The strain experienced by the wire would increase by a factor of 4.E)The strain experienced by the wire would increase by a factor of 2.F)Young's modulus would be reduced by a factor of 4.
Answers
If we were to re-suspend the weight and double the wire's radius, The strain experienced by the wire would decrease by a factor of 2 will be correct.
It is an elastic modulus that describes the stress and strain of a material when subjected to elastic deformation under tension or compression.
It characterizes the material's elasticity (i.e., elastic modulus) and is one of the most important mechanical properties of solids.
The formula for strain is ε = ΔL/L.
The original length is denoted by L, while the change in length is denoted by ΔL.
The formula for Young's modulus is E = σ / ε. E is Young's modulus, σ is the stress, and ε is the strain.
The S.I. unit of Young's modulus is Pascals (Pa).
Therefore, The strain experienced by the wire would decrease by a factor of 2 will be correct.
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which of the following does not influence the speed of water in a
stream?
a. gradient
b. discharge
c. channel geometry
d. flow
Answers
Pption d. flow does not independently influence the speed of water in a stream. Instead, it is an outcome determined by the combined effects of gradient, discharge, and channel geometry.
The flow itself, or the rate at which water moves in a stream, is not an independent factor that influences the speed of water in a stream. Instead, it is a result of other factors such as gradient, discharge, and channel geometry.
a. Gradient: The gradient, or slope, of the stream affects the speed of water. Steeper gradients generally lead to faster-flowing water.
b. Discharge: The discharge of a stream, which refers to the volume of water passing through a given point in a specified amount of time, directly affects the speed of water. Higher discharge results in faster flow.
c. Channel geometry: The shape and dimensions of the stream channel also influence the speed of water. Wider and deeper channels tend to have slower flow, while narrower and shallower channels often lead to faster flow.
Therefore, option d. flow does not independently influence the speed of water in a stream. Instead, it is an outcome determined by the combined effects of gradient, discharge, and channel geometry.
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Three packing crates of masses, m 1 is 6 kg, m2 is 2kg and m3 is 8kg are connected by a light string of negligible mass that passes over the pulley. masses m1 and m3 lies on a 30 degree inclined plane which slides down the plane. the coefficient of kinetic friction on the incline plane is 0.28. determine the tension in the string that connects m2 and m3?
Answers
The string is in tension, which implies that the direction of the tension in the string is in the opposite direction. So, the magnitude of the tension in the string that connects m2 and m3 is 89.335 N.
Three packing crates of masses m1, m2, and m3 are connected by a light string of negligible mass that passes over the pulley. The masses m1 and m3 lie on a 30 degree inclined plane which slides down the plane. The coefficient of kinetic friction on the incline plane is 0.28.
We are required to determine the tension in the string that connects m2 and m3.
The forces acting on the system are: The gravitational force acting on m1, m2, and m3, the tension force on the string between m2 and m3, and the frictional force opposing the sliding motion of m1 and m3.
For all the masses to move together with a constant acceleration, the net force acting on the system must be equal to the total mass of the system (m1 + m2 + m3) times the acceleration of the system.
Therefore,\(Fnet = (m1 + m2 + m3) a\)
Where Fnet = Ft - f - (m1g sin θ + m3g sin θ) = (m1 + m2 + m3) a
Where Ft is the tension force, f is the frictional force opposing the motion, g is the acceleration due to gravity, and θ is the angle of inclination.
Substituting values,\(m2g - (m1 + m3) g sin θ - f = (m1 + m2 + m3) a\)
Here, f = coefficient of kinetic friction × normal force = 0.28 × (m1 + m3) g cos θ
Putting the values into the equation and solving for Ft,
we have\(,Ft = m2g - (m1 + m3) g sin θ - f\)
Ft = (2 × 9.81) - [(6 + 8) × 9.81 sin 30] - 0.28 × (6 + 8) × 9.81 cos 30
Ft = 19.62 - 68.766 - 41.185
Ft = -89.335 N
However, we cannot have negative tension, which implies that the magnitude of the calculated tension is incorrect. Therefore, the string is in tension, which implies that the direction of the tension in the string is in the opposite direction. So, the magnitude of the tension in the string that connects m2 and m3 is 89.335 N.
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12. You and a friend are playing a game of basketball. Explain why the
basketball appears orange, be sure to use terms reflected and absorbed
in your answer. [4]
Help me plssss I’m giving out brainlest and 10 points
Answers
Answer:
If the basket ball appears orange then it can be said that it reflects orange light
Explanation:
The color of the object reflected by an object is the color which is viewed by a viewer. Hence, if the basket ball reflects the orange color light , then the ball will appear orange in color to the viewer.
The light absorbed by the object has no role in deciding the color of the object visible to a viewer.
hence, if the basket ball appears orange then it can be said that it reflects orange light.
A horse runs for 15 seconds to the south at a speed of 12 m/s. What is the
displacement of the horse in this time?
A. 180 m south
B. 150 m south
C. 150 m
D. 180 m
Answers
Answer: 180 m south
Explanation:
The displacement of the horse in this time is 180 m south. The correct option is A.
What is displacement?The displacement is the shortest distance travelled by the particle. It is the vector quantity which re[presents both the magnitude and direction.
Velocity is the time rate of change of displacement with time.
Given is a horse runs for 15 seconds to the south at a speed of 12 m/s. So, the displacement is
Displacement = Speed x Time
Put the values, we get
Displacement = 12 m/s x 15s
= 180 m
Thus, the displacement of the horse in this time is 180 m south.
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what happens to kinetic energy as speed doubles and mass doubles
Answers
Answer:
If you double the mass of an object, you double the kinetic energy. If you double the speed of an object, the kinetic energy increases by four times. Kinetic energy can be passed from one object to another in the form of a collision....What happen to the kinetic energy of its velocity become double ? The energy possessed by a body because of its motion, equal to one half the mass of the body times the square of its speed is called its kinetic energy. Hence, when velocity is doubled, kinetic energy becomes 4 times.
Explanation:
Answer: It increases by four times
Explanation: If you double the mass of an object, you double the kinetic energy. If you double the speed of an object, the kinetic energy increases by four times. Kinetic energy can be passed from one object to another in the form of a collision.
Why are choir concerts better in performance halls than in gymnasiums?
Please Mention the scientific terms.
Reflection, Refraction, Diffraction, Echo, Constructive Interference, Destructive Interference, Doppler Effect and Longitudional Waves.
Answers
Constructive interference in performance halls and the elimination of echoes are reasons why choir concerts better in performance halls than in gymnasiums.
What is constructive interference?Constructive interference is a phenomenon which occurs when two waves travelling in same direction and which are in phase add up together to produce a wave of greater amplitude.
Constructive interference occurs in performance halls while destructive interference occurs in gymnasiums.
Also in performance halls, echoes are minimized due to the padded walls and the curtains while echoes which disturb choir concerts occur in gymnasiums.
Therefore, choir concerts better in performance halls than in gymnasiums because of constructive interference in performance halls and the elimination of echoes.
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4. Which statement summarizes the excerpt? *
a. There are benefits of space junk to future astronauts.
b. Space junk is becoming an increasingly dangerous problem.
c. There are effective ways to get rid of the accumulating space trash.
d. Scientists are developing ways to prevent space junk.
Answers
why do we never see the moon next to, say, polaris?
Answers
We never see the Moon next to Polaris (the North Star) because the Moon's orbit around the Earth is not aligned with the Earth's rotation axis. Instead, the Moon's orbit is inclined at an angle of about 5 degrees to the Earth's orbit around the Sun.
This means that the Moon appears to move across the sky along a path that is inclined at a similar angle to the Earth's equator. Polaris, on the other hand, appears to remain in a fixed position relative to the Earth's rotation axis. As a result, the Moon and Polaris appear to move along different paths in the sky and are unlikely to be seen next to each other.
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7. A car traveled at a steady speed of 24 m/s north for 30 minutes. What distance was covered?
Answers
1 minute = 60 seconds
30 minutes x 60 = 1800 seconds
24 m/s x 1800 seconds = 43,200 meters
1000 meters = 1 km
43,200 meters / 1000 = 43.2 km
The car traveled 43.2 km
seesaw unbalanced force explain
Answers
Force is a ____ or a ____ on an object that changes or tends to change the state of rest or uniform motion of an object.
Answers
Force is a push or a pull on an object that changes or tends to change the state of rest or uniform motion of an object.
Let's break this down step-by-step:
1. Force: Force is a physical quantity that describes the interaction between two objects. It can be exerted through direct contact (contact force) or from a distance (non-contact force). Examples of forces include gravity, friction, and tension.
2. Push or pull: A force can either be a push or a pull. When you push an object, you apply a force in one direction away from your body. On the other hand, when you pull an object, you apply a force in one direction towards your body.
3. State of rest: If an object is at rest, it means it is not moving. When a force is applied to an object at rest, it can cause the object to start moving. For example, pushing a stationary car can make it move.
4. Uniform motion: Uniform motion refers to an object moving in a straight line at a constant speed. When a force is applied to an object in uniform motion, it can change the speed or direction of the object.
Overall, force is a fundamental concept in physics that explains how objects move or change their motion. It can be a push or a pull, and it can change the state of rest or uniform motion of an object.
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How are representative democracies and direct democracies similar?
In both, elected officials meet to make laws.
The power lies with the people in both types of government.
Both types of government work well in countries with large populations.
In both, citizens often represent themselves in voting on government decisions.
BRAINLYIST IS THE REWARD
Answers
Answer:
The answer is Both types of government work well in countries with large populations.
Explanation:
Answer:
its d
Explanation:
No energy using device operates at 100% efficiency because son energy is lost as heat as explained by a. the second law of thermodynamics b. the first law of thermodynamics c. the conservation of momentum law d. Darcy's law e. Newton's third law of momentum
Answers
The reason no energy-using device operates at 100% efficiency and some energy is lost as heat, is explained by (a) the second law of thermodynamics. This law states that in any energy conversion process, the entropy (disorder) of the system increases, which leads to some energy being lost as heat.
The second law of thermodynamics states that in any energy conversion process, some energy will inevitably be lost as heat, and this loss is unavoidable. The first law of thermodynamics, on the other hand, states that energy cannot be created or destroyed, but it can be converted from one form to another. The conservation of momentum law deals with the conservation of linear momentum in a system, while Darcy's law describes the flow of fluids through porous materials. Newton's third law of momentum states that for every action, there is an equal and opposite reaction.
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You apply a constant force F = (-68.0 N)i + (36.0 N)j to a 380 kg car as the car travels 49.0 m in a direction that is 240.0 degrees counterclockwise from the +x-axis. How much work does the force you apply do on the car?
Answers
The work done by the force you apply to the car is approximately -2455.22 joules (J). The negative sign indicates that the work done is in the opposite direction of the displacement, suggesting that energy is being transferred out of the car.
To calculate the work done by the force applied to the car, we can use the equation:
Work = Force * Displacement * cos(theta)
Substituting the given values:
Force = (-68.0 N)i + (36.0 N)j
Displacement = 49.0 m
Theta = 4.18879 radians
Work = (-68.0 N)(49.0 m) * cos(4.18879 radians)
Work ≈ -2455.22 J
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A student attaches a rope to a box and pulls the box up a ramp as shown below. The ramp has a rough surface. When
drawing the free body diagram for the box, the friction force should be directed:
O up and to the right
down and to the left
up and to the left
to the left
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ASK FOR HELP
TURN ITIN
Answers
_______ is the surest test which confirms that the given piece of the object is a magnet.
1.Rotation
2.Repulsion
3.None of these
4.Refraction
Answers
Answer:
2. Repulsion
Explanation:
number two is the answer
Answer:
Repulsion is the surest test which confirms that the given piece of the object is a magnet.
........
The speed of a sound wave in air is 340 metres per second. The speed of a sound wave in solid concrete is 2950 metres per second
Use ideas about particles to suggest reasons for the difference in speed?
pls help
Answers
Because solid concrete is stiffer, denser, and typically warmer than air, the speed of sound in solid concrete is faster than in air.
The speed of sound waves in air has been measured to be 340 m s.The sound wave moves at a 340 m/s pace. D = v • t can be used to calculate the distance, giving a value of 25.5 m. Since 0.150 seconds is the round-trip distance, use 0.075 seconds for the time.
Is 340 metres per second the speed of sound in air?The speed at which a sound source needs move in the direction of a stationary observer in order to double the apparent frequency. 640 m s - 1.
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You pull a sled with a package on it across a snow-covered flat lawn. If you
apply a force of 65.1 N to the sled, it accelerates at 1.24 m/s2. What is the
combined mass of the package and the sled? (Assume there is no friction.)
Answers
Answer:52.5
Explanation:
You pull a sled with a package on it across a snow-covered flat lawn. If you apply a force of 65.1 N to the sled, it accelerates at 1.24 m/s2. The combined mass of the package and the sled m = 52.50 kg
The given data to find Mass,
The force applied to the sled, F = 65.1 N
Acceleration of the sled, a = 1.24 m/s²
What is force?Forces are defined by both strength and direction.
Force is a vector quantity. It is a quantity that is described by Magnitude and Direction. The strength of a force is its magnitude and the direction, well it is the direction the magnitude is applied on the object.
We need to find the combined mass of the package and the sled. Let it is m. Using definition of force as follows :
F = ma
m = F/a
m = 65.1 /1.24
Mass, m = 52.5 Kg.
If you apply a force of 65.1 N to the sled, it accelerates at 1.24 m/s2. The combined mass of the package and the sled m = 52.50 kg
Hence, Option C is the correct answer.
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a person is riding on a ferris wheel. when the wheel makes one complete turn, the net work on the person by the gravitational force . (a) is positive (b) is negative (c) is zero (d) depends on how fast the wheel moves (e) depends on the diameter of the wheel
Answers
A person is riding on a Ferris wheel. when the wheel makes one complete turn, the net work on the person by the gravitational force is Zero.
When a person rides on a ferris wheel, the gravitational force acting on them is constant. This force is directed downward, towards the center of the Earth. The person's displacement, or movement, is also constant, as they move in a circular path around the center of the ferris wheel. However, the displacement is perpendicular to the direction of the gravitational force.
Since the force and displacement are perpendicular, the work done by the gravitational force is zero. Work is defined as the product of force and displacement, and in this case, the dot product of the force and displacement vectors is zero because they are perpendicular.
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vernier caliper if the top half says 1 and 3 and the bottom half says 0 and 10 what is the reading
Answers
It's a little unclear what you mean by "the top half" and "the bottom half" of the Vernier caliper.
However, assuming you are referring to the main scale and the Vernier scale, respectively, here is how you can read the caliper:
Read the main scale: Look at the scale on the top half of the caliper and identify the whole number before the decimal point. In this case, it should be 13 (i.e., one inch plus three tenths of an inch).
Read the Vernier scale: Look at the scale on the bottom half of the caliper and find the line that lines up with a line on the main scale. The number corresponding to this line on the Vernier scale is the fraction of an inch you need to add to the main scale reading. In this case, it seems like the Vernier scale has 10 divisions that span the same distance as 9 divisions on the main scale, which gives a Vernier constant of 0.1 inch / 9 = 0.011111 inch. Assuming the zero line on the Vernier scale lines up with a line on the main scale, the line on the Vernier scale that lines up with another line on the main scale should be the one that is 0.1 inch minus 0.3 inch = -0.2 inch away from the zero line. However, since the Vernier constant is 0.011111 inch, this line should be the 18th line on the Vernier scale (counting from the left). Therefore, the fraction of an inch to add to the main scale reading is 0.018 inch (i.e., 18 divisions times the Vernier constant).
Putting these together, the reading on the Vernier caliper should be 13.018 inches.
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