F&Q FREE FALL PROBLEMS WORKSHEET QUARANTINE WEEK 2

WORKSHEET QUARANTINE WEEK 2

FREE FALL PROBLEMS

Instructions: Read each question carefully. Choose the answer that best fits the question. Short answer response questions must be responded to in complete sentences. If the question involves calculations, you must show all your math work.

1. Free fall is an idealized situation in which air friction is ignored, and objects accelerate at a constant downward 9.8m/s2. If you throw your graduation cap upward, the cap is in free fall the moment it leaves your hand, even though it is moving in an upwards direction.

1. True
2. False

2. From how high up do you have to drop a marble for it to hit the ground in exactly 1 s?
   1. 5.1m
   2. 9.8m
   3. 4.9m
   4. 3.6m
3. A quarter is flipped up in the air at the start of a football game and returns to the point from which it was flipped after 2.5s. What would be the quarter’s original speed, presuming that the acceleration of the quarter is 9.8m/s² downward?
   1. 4.9 m/s
   2. 25 m/s
   3. 12.25 m/s
   4. 49 m/s
4. An outfielder is practicing catching pop-up fly balls. He throws the baseball straight up with a velocity of +15 m/s. At what height will it reach its peak, if it falls back to his mitt, at the same height he released the ball, in 3 s?

1. 45 m
2. 22.5 m
3. 11.5 m
4. 10 m

4. The distance traveled by a freely-falling body is proportional to

1. the mass of the body.
2. the square of the acceleration due to gravity.
3. the square of the time of fall.
4. the time of fall