Test corrections Force Test A

Question 1

6. The relationship among mass, force, and acceleration is explained by

Answer 1

C. Newton’s 2nd law of motion

Question 2

10. A baseball player swings his bat and misses the ball but hits a fly that was hovering over home plate. The acceleration of the fly compared to what the acceleration of the ball would have been with the same force applied would be

Answer 2

B. Larger

Question 3

11. A 500 N force is applied to a 25m/s2 object. The mass of the object is_______.

Answer 3

D. 20 kg

Question 4

14. What is the acceleration of the box in the picture to the right?

Answer 4

D. 12m/s2

Question 5

15. What is the weight of the box in the picture to the right.

Answer 5

C. 245 kg

Question 6

16. Compared to the inertia of a 2.0 kg ball, the inertia of a 4.0 kg ball is

Answer 6

B. Twice as great

Question 7

17. Consider a watermelon that starts from rest and is dropped straight down from a tall building. Air resistance can be ignored. Which statement about the watermelon’s acceleration is false?

Answer 7

A. The watermelon falls with a constant velocity

Question 8

21. Which of the following best describes how a swimmer moves through the water?

Answer 8

A. The swimmer pushes backwards on the water and the water pushes with an equal but opposite force back on the swimmer.

Question 9

24. In the picture to the right, if the card were quickly pulled off the cup like the arrow suggests, what property would explain why the coin falls into the cup rather than moving with the card?

Answer 9

C. Inertia

Question 10

26. Push or pull one body exerts on another.

Answer 10

A. Force

Question 11

30. To every action, there is an equal and opposite reaction.

Answer 11

G. Newton’s third law