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- 1. Multiple Choice
A skydiver jumps out of a plane and is falling towards the Earth before she opens her parachute.
She is in free fall because nothing is holding her up.
She is in free fall because gravity is pulling her down.
She is not in free fall because skydiving is an expensive hobby.
She is not in free fall because gravity is not the only force she is experiencing.
- 2. Multiple Choice
The first space tourist sneaks his pet gerbil up onto the International Space Station and lets the little guy float around.
The gerbil is in free fall because the only force acting on it is gravity.
The gerbil is in free fall because it's floating around and not touching anything.
The gerbil is not in free fall because it's in orbit and not falling towards the Earth.
The gerbil is not in free fall because even though it's owner didn't pay it's way, space tourism is still an expensive hobby.
- 3. Multiple Choice
Using g = -10 m/s2:
A ball is tossed up from the ground at a speed of 40 m/s. How many seconds does it take to get to the top of its arc?
2
4
6
8
- 4. Multiple Choice
Using g = -10 m/s2:
A ball is tossed up from the ground at a speed of 40 m/s. How many seconds does it take for it to come back down to the ground?
2
4
6
8
- 5. Multiple Choice
Using g = -10 m/s2:
A ball is tossed up from the ground at a speed of 40 m/s. At how many seconds will it be travelling at a speed of 20 m/s?
(Choose all that apply)
2
4
6
8
- 6. Multiple Choice
Using g = -10 m/s2:
A ball is tossed up from the ground at a speed of 40 m/s. At how many seconds will it be travelling at a velocity of -20 m/s?
(Choose all that apply)
2
4
6
8
- 7. Multiple Choice
Using g = -10 m/s2:
A ball is tossed up from the ground at a speed of 40 m/s. What will its velocity be after 3 seconds?
30 m/s
10 m/s
0 m/s
-20 m/s
-50 m/s
- 8. Multiple Choice
Using g = -10 m/s2:
A ball is tossed up from the ground at a speed of 40 m/s. What will its velocity be after 7 seconds?
-30 m/s
The ball will hit the ground before then.
0 m/s
10 m/s
40 m/s
- 9. Multiple Choice
Using g = -10 m/s2:
A ball is tossed up from the ground at a speed of 40 m/s. How many seconds will it take to reach a velocity of -50 m/s?
2
The ball will hit the ground before then.
7
8
9
- 10. Multiple Choice
Using g = -10 m/s2:
A ball is tossed up from the ground at a speed of 40 m/s. What is its velocity at the top of its arc?
20 m/s
10 m/s
0 m/s
-20 m/s
-40 m/s
- 11. Multiple Choice
Using g = -10 m/s2:
A ball is tossed up from the ground at a speed of 40 m/s. What is its velocity when it hits the ground?
20 m/s
10 m/s
0 m/s
-20 m/s
-40 m/s
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