10 Questions
| Attempts: 895

You may take this quiz 3 times. I will keep your best score.

Questions and Answers

- 1.If a mass is at rest, what must be applied to cause it to move?
- A.
Kilograms

- B.
Speed

- C.
Vectors

- D.
Force

- 2.If you push on a wall with a force of 30 N, then ______________.
- A.
The wall pushes on you with a force of 30 N.

- B.
The wall moves back 3 cm.

- C.
The wall cannot be forced.

- D.
You are pulled towards the wall.

- 3.If you have to push a car forward, what are the forces acting on you?
- A.
The car pushes back on you, gravity pulls you down, the ground pushes up on you, and friction on your shoes pushes forward on you.

- B.
Only gravity.

- C.
Your own muscles push you down.

- D.
No forces act on you.

- 4.A person jumps to the ground from a platform 10 feet high. Which of the following is true?
- A.
The person has more kinetic energy before they jump than after they jump.

- B.
The person has less potential energy at the top of the platform than in the air.

- C.
The person's potential energy at the instant they jump is approximately equal to their kinetic energy the instant they land.

- D.
The person's kinetic energy at the instant they jump is approximately double their potential energy the instant they land.

- 5.The potential energy of an object is equal to ____________.
- A.
The work done on the object to put the object into its current state.

- B.
The velocity of the object divided by its mass.

- C.
The force of gravity working on the object.

- D.
The size of the object compared to its surface area.

- 6.The kinetic energy of an object will increase the most if you __________________.
- A.
Double the velocity of the object

- B.
Double the mass of the object

- C.
Double the potential energy

- D.
Double the temperature of the object

- 7."Power" is defined as _________________.
- A.
The rate at which work is done

- B.
The energy necessary to do work

- C.
The velocity of an object squared

- D.
The sum of potential and kinetic energy

- 8.An object with mass "m" kilograms is suspended "h" meters above the ground by a string. If the string is cut, what will the velocity of the object be at the instant it hits the ground?
- A.
The square root of 2gh

- B.
One-half the mass squared

- C.
Two times ghm squared

- D.
H-2gm

- 9.Which of the following is NOT a consequence of "The Law of Conservation of Energy"?
- A.
Potential Energy can never be greater than Kinetic Energy

- B.
The energy in a closed system is always constant

- C.
The Kinetic Energy of a dropped object at the instant it hits the ground is roughly equal to the potential energy of the object at the instant it was dropped

- D.
It is not necessary to use Kinematics to discover the velocity of an object accelerated by gravity if you know it's initial Potential Energy and its mass.

- 10.As an object goes up a hill at constant velocity, which of the following is NOT true?
- A.
The object's Potential Energy is increasing.

- B.
The object's Kinetic Energy is decreasing.

- C.
The object's Kinetic Energy is constant.

- D.
The object's speed is constant.

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