Free fall
Grade 11 Science Worksheet - Challenge Me
Circle the best answer, or write your answer on the line.
A ball is dropped from a drone hovering 78.4 m above the ground. With g = 9.8 m/s² and no air, how long does it take to land, Bo?
A ball is dropped from a drone hovering 122.5 m above the ground. With g = 9.8 m/s² and no air, how long does it take to land, Esme?
In the position-time graph, what is the ball's average velocity from 1 s to 2 s, Jun?
- 4.9 m/s
- 14.7 m/s
- 9.8 m/s
- 19.6 m/s
In the position-time graph, why does the line curve and get steeper, Kira?
Use the picture in question 3.
- The air pushes it down harder
- The speed grows each second
- The ball gets heavier as it falls
- The ball falls at a steady speed
In the position-time graph, what is the slope of the tangent at 2 s, Luz?
Use the picture in question 3.
- 19.6 m/s
- 4.9 m/s
- 9.8 m/s, from 19.6 m ÷ 2 s
- 39.2 m/s
Milo says a ball launched straight up has no acceleration at the top. Agree or disagree?
- Agree: heavier balls fall faster
- Agree: zero velocity means zero acceleration
- Agree: acceleration points the way it moves
- Disagree: it is still 9.8 m/s² down
Pia says Apollo 15's hammer and feather landing together shows that mass doesn't change free fall. Agree or disagree?
- Agree: with no air, both fell at the same g
- Disagree: acceleration follows the motion
- Disagree: heavier things fall faster everywhere
- Disagree: they stopped at the top first
A ball dropped from a drone takes 3 s to land, with no air. How high was the drone, Ren?
- 29.4 m
- 88.2 m
- 14.7 m
- 44.1 m
A drone drops one ball, then another 1 s later. While both fall, what happens to the gap between them, Tala?
- It shrinks
- It stays the same
- It stays 4.9 m
- It keeps growing
A ball dropped from rest falls 4.9 m with no air. How fast is it going then, Zee?
- 96 m/s
- 48 m/s
- 9.8 m/s
- 4.9 m/s