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- 1. Multiple Choice
The acceleration of a freely falling body on Earth is
9.8 m/s.
9.8 m.
9.8 m/s2.
9.8 s.
- 2. Multiple ChoiceIf you know the time an object is in the air, can you find the Vf of the object?Yes, you would have to halve the time since the Ttotal is for both rise and fall and you would have to calculate the height the object rose before finding the VfYes, you would use the time the object was in the air to find the distance the object travels upward beforeNo, you are not given enough informationNo, it depends on the acceleration, which is different on the way up and on the way down.
- 3. Multiple ChoiceWhich would fall with greater acceleration in a vacuum—a leaf or a stone?the leafthe stoneThey would accelerate at the same rate.It is difficult to determine without more information.
- 4. Multiple ChoiceWhen there is no air resistance, objects of different masses dropped from restfall with equal accelerations and with equal displacements.fall with different accelerations and with different displacements.fall with equal accelerations and with different displacements.fall with different accelerations and with equal displacements.
- 5. Multiple Choice
A ball is thrown upwards and caught when it comes back down. In the absence of air resistance, the
when would the ball reach a velocity of 0 m/s?
at the top
at the bottom
in the middle
- 6. Multiple ChoiceIn a normal environment, why does a bowling ball and feather hit the ground at different times when dropped from the same height?They don't; they hit the ground at the same time.One is more dense than the other.One is heavier than the other.Air resistance
- 7. Multiple Choice
If an object is dropped from a cliff of 100m, what are your 'givens' you can start with?
CHECK ALL THAT APPLY.
d = 100 m
vi = 0
t = 100 s
a = 9.8 m/s2
vf = 0
- 8. Multiple Choice
You are standing on the top observation deck of the Eiffel Tower in Paris at a height of 300 meters. You drop your cell phone. How fast will the phone be traveling when it hits the ground?
9.8 m/s
76.68 m/s
149.76 m/s
46.99 m/s
- 9. Multiple Choice
An object free falls for 3.5 seconds. How far does it fall?
120.05 m
17.15 m
60.03 m
34.3 m
- 10. Multiple Choice
While walking in the classroom you accidently hit a water bottle and it falls off of the 0.75 m desk. How long does it take to reach the ground?
0.39 s
2.04 s
2.76 s
0.82 s
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