Test - Unit 6 Force

Question 1

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

Answer 1

800 N up

U6 C3 Notes. P 23

Question 2

22. An object that is falling freely has a constant what?

Answer 2

Acceleration

U6 C3 Notes. P 22

Question 3

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

Answer 3

Newton’s second law explains this.

U6 C3 Notes. P 22

Question 4

38. c. Why does this occur?

Answer 4

The gravity and air resistance become equal and cause the skydiver to fall at a constant velocity.

U6 C3 Notes. P 22

Question 5

43. A man and his bike are 95 kg. His instantaneous speed at one point is 14m/s. The next time his speed is checked he is going 28m/s. If the second speed was taken 7 seconds later, what force must the man have given his bike to change his speed? What was the the bicyclist’s final momentum.

Answer 5

190 N

U6 C3 Notes. P 22