1. A ball is thrown upward with an initial velocity of 5.2 m/s. How high will the ball rise?

(a) 0.16 m

(b) 1.0 m

(c) 0.65 m

(d) 1.4 m

2. A cheetah starts from rest and accelerates at a constant rate of 8.4 m/s2 to a speed of 9.2 m/s. How long does it take the cheetah to reach this speed?

(a) 0.80 s

(b) 1.1 s

(c) 0.90 s

(d) 1.8 s

Indicate whether each statement is true or false. If you think the statement is false, rewrite it to make it true.

3. The average velocity of an object is the distance traveled divided by the change in time.

4. The total change in an object's velocity is its average acceleration divided by the total change in time.

5. It is possible for a parachutist to stop accelerating while falling through the air.

6. A vertical line on an acceleration-time graph shows that an object's velocity is constant. Match each term on the left with the most appropriate description on the right.

7.

(a) displacement(i) an example of a scalar quantity

(b) velocity (ii) area under a velocity-time graph

(c) speed (iii) slope of a velocity-time graph

(d) acceleration (iv) slope of a position-time

Write a short answer to each question.

8. What is the difference between a scalar quantity and a vector quantity? Give one example of each. 9. Give an example of the vector addition of two displacements that are in opposite directions. What is the total displacement?

9. Give an example of vector addition of two displacements that are in opposite directions. What is the total displacement?