Test U6 - Force

Question 1

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

Answer 1

B. The same

Question 2

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

Answer 2

C. 25 N

Question 3

8. Consider a watermelon that starts from rest and is dropped strait down from a tall building. Air resistance can be ignored. Which statement about the watermelon’s motion is False.

Answer 3

A. The watermelon falls with a constant velocity.

Question 4

32. Related to the amount of force needed to change an objects motion.

Answer 4

i. Momentum

Question 5

34. Why does it take more effort to make a bowling ball accelerate 25 m/s than to make a tennis ball accelerate 25 m/s? Make sure to include which law explains this.

Answer 5

The bowling ball has more mass so it takes more force to move it. Newton’s 2nd law

Question 6

If a rock is skipped into a lake at 24 m/s2, with what force was the rock thrown if it was 1.75 kg?

Answer 6

F = ?                      F = ma
a = 25 m/s2        F = 1.75(24)
M = 1.75 kg         F = 41.28 N

Question 7

27. The highest velocity a falling object will reach.

Answer 7

K. Terminal Velocity