1... A ball is thrown up into the air into free fall. As the ball moves upward, which of these quantities remains constant?

A. gravitational potential energy

B. mechanical energy

C. kinetic energy

2... An apple is dropped from rest into free fall. Which of these best describes the acceleration of the apple as it falls?

A. the apple increases all the way to the ground

B. the apple changes direction all the way to the ground

C. the acceleration of the apple remains the same all the way to the ground

3... Given an experiment with a cup that slides down an incline with a constant acceleration. The cup starts from rest. The distance the cup has slid down the incline after 9.00 seconds is _____ the distance it slid down the incline at a time of 3.00 seconds. Which of these best fills in the blank?

A. nine times

B. three times

C. two times

4... A student is measuring the mass of a sphere using an electronic balance. Before the student places the sphere on the balance, the balance already reads a value of 0.001 gram even though nothing is on the balance. Does this balance suffer from a systematic error?

A. no, it suffers from random error only

B. yes, it is a systematic error because the equipment has not been zeroed properly

5... A student starts and stops a stopwatch in a time of 0.22 second as recorded on their digital stopwatch. If the student wants to record this time in SI units then what value should be recorded on the datasheet?

A. 22

B. 0.22

C. 2.2

6... A soccer ball flying through the air in free fall at some height above the ground has a kinetic energy of 10.0 J and a gravitational potential energy relative to the ground of 10.0 J. Later, the ball has moved to a different position where its kinetic energy is 5.00 J. What is the gravitational potential energy of the ball relative to the ground at this second location in SI units?

A. 5.00

B. 10.0

C. 15.0

7... When equals the change in what quantity?

A> kinetic energy

B. velocity

C. displacement

8... A toy car starts from rest and travels across a floor with a constant acceleration of 2.00 m/s^2. Is this car in free fall?

A. Yes

B. No

9... Suppose you measure the length of a pencil with a ruler. No matter how hard you try, your measurement will still have random error. True or False?

A. true

B. false

10... A man goes for a walk along a straight line starting at a position of 5.00 m. When the man completes his walk, his final position is 2.00 m. Is the displacement of the man zero? Yes or No?

A. yes

B. no