Test - Unit 6 Force

Question 1

4. An object in motion with no unbalanced forces acting on it will…

Answer 1

Continue to move in its path at a constant speed

Notes U6 C3 page 1

Question 2

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 motion is FALSE?

Answer 2

The watermelon falls with a constant velocity.

Notes U6 C3 page 2

Question 3

18. A man weighing 800 N is standing on a chair. In order to support the man, what force is the chair exerting?

Answer 3

800 N up

Notes U6 C3 page 1

Question 4

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 4

Inertia

Notes U6 C3 page 1

Question 5

34. Why does it take more effort to make a bowling ball accelerate 25 m/s2 than to make a tennis ball accelerate 25 m/s2?

Answer 5

The bowling ball has more mass, thus needs a grater force to accelerate it.
2nd Law

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Question 6

38. b. What speed will the skydiver eventually reach?

Answer 6

55 m/s

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Question 7

38. c. Why does this occur?

Answer 7

Gravity + air resistance become balanced.
Falling human falls at a constant velocity.

Notes U6 C3 page 3