1.. A ball is dropped from rest into free fall. At rest at the initial position, the ball has a gravitational potential energy of PE_i relative to the ground. When the ball is halfway to the ground, its gravitational potential energy will be which of these?

A. PE_i

B. half of PE_i

C. zero

2.. A ball is dropped from rest into free fall. Which of these correctly describes the kinetic energy (or KE) of the ball as it falls?

A. this ball has non KE as it falls

B. the KE of the ball remains the same all the way down to the ground

C. the KE of the ball increases all the way down to the ground

3.. Given an experiment with a cup that starts from rest and slides down an incline with a constant acceleration. With perfect data, a graph of which two quantities should be a straight line?

A. distance and time squared

B. velocity and time squared

4.. Given a box of mass 9.00 kg at a height of 4.00 meters above the floor. When calculating the gravitational potential energy of the box relative to the floor, which of these quantities do you NOT need to know?

A. the weight or mass of the box

B. the height of the box relative to the floor

C. the velocity of the box

5. A block of mass 1.00 kg is hit by a force of magnitude F which causes the block to have an acceleration of magnitude 2.00 m/s^2. What is the force, F, in Newtons?

A. 1.00

B. 3.00

C. 2.00

6. A student wants to hit an object with a force of 6.00 N and get the largest acceleration possible. You can hit a textbook of mass 10.0 kg, a filing cabinet of mass 200 kg or a crate of mass 300 kg. Which mass should the student hit?

A. the filing cabinet

B. the crate

C. the textbook

7. A block of mass m is hit by a force which causes the block to have an acceleration of magnitude a. If the same force hits a second block of mass 2m, then the acceleration of the second block will have what magnitude?

A. one fourth of a

B. a

C. one-half of a

8. If a student measures the length of one side of a box as 9.72 cm but wants to record the measurement in SI units then what value should be recorded on the datasheet?

A. 9.72

B. 9.7

C. 0.0972

9. A car of mass m1 moving along a flat road has an initial velocity of magnitude v. The car then takes on a load which increases its mass to 6m1. When the car now has a velocity v by what factor has the kinetic energy of the car increased in taking on the load?

A. 6

B. one sixth

C. 36

10. A force of 6.00 Newtons is used to push a crate across a smooth floor with an acceleration, a. If more force is used then the new acceleration should be more than a. Yes or No?

A. yes

B. no

just answers, you don't have to add an explanation just answers, you don't have to add an explanation