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- 1. Multiple Choice
What is the acceleration of a ball that is dropped off the side of a cliff after 1,2,3,4,5 seconds? (assume g is rounded to 10 m/s2)
5,10,15, 20, 25 m/s2
10, 20, 30, 40, 50 m/s2
5, 20, 45, 80, 125 m/s2
10,10,10,10,10 m/s2
- 2. Multiple Choice
What is the vertical velocity of a ball that has been dropped off a cliff after 1 , 2, 3, 4, and 5 seconds? (assume g is rounded to 10 m/s2)?.
10, 20, 30, 40, 50 m/s
5, 10, 15, 20, 25 m/s
5, 20, 45, 80,125 m
10,10,10,10,10 m/s
- 3. Multiple Choice
How does the initial vertical velocity, Viy, compare to the final vertical velocity, Vfy, when a ball is thrown up into the air and caught at the same height ?
Vi y and Vfy are exactly the same, this is because of symmetry
Viy and Vfiy are close but Vfy is larger because you would fall faster than you would rise, since you are slowing down
Viy and Vfy are the same in magnitude, but different in direction.
Viy and Vfy are different in magnitude and direction.
- 4. Multiple Choice
The change in velocity in a given time period is?
initial velocity
final velocity
acceleration
displacement
- 5. Multiple Choice
When speed and direction remain the same throughout motion, this is called?
Accelerated motion
Constant motion
Changing motion
Changing velocity
- 6. Multiple Choice
When the velocity of an object does not change, what happens to its acceleration?
Nothing, it does not accelerate.
It is constant acceleration
It is changing acceleration
Need more information to determine
- 7. Multiple ChoiceWhen an object falls in physics world, what happens?It accelerates at a constant rate until it hits the groundIt accelerates at a non-constant rate until it hits the groundIt accelerates at a constant rate until it reaches terminal velocityIt accelerates at a non-constant rate until it reaches terminal velocity
- 8. Multiple Choice
Which of the following statements applies to the motion of a ball rising and then falling in free fall?
I. The ball has constant acceleration as it moves upward.
II. The ball has constant acceleration at the top of its path.
III. The ball has constant acceleration as it moves downward.
I only
III only
I and III
I, II, and III
- 9. Multiple Choice
Which would hit the ground first if dropped from the same height in a vacuum—a feather or a metal bolt?
the feather
the metal bolt
They would hit the ground at the same time.
They would be suspended (floating) in a vacuum.
- 10. 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.
- 11. Multiple ChoiceIf a freely falling object were somehow equipped with a speedometer, its speed reading would increase each second byabout 5 m/s.about 10 m/s.about 15 m/s.a rate that depends on its initial speed.
- 12. Multiple Choice
If you throw a baseball straight up, what is its vertical velocity at the highest point?
9.8 m/s2
9.8 m/s
0 m/s2
0 m/s
- 13. Multiple Choice
A ball is thrown upwards and caught when it comes back down at the same height. In the absence of air resistance, the speed of the ball when caught would be
less than the speed it had when thrown upwards.
more than the speed it had when thrown upwards.
the same as the speed it had when thrown upwards.
need more information to determine.
- 14. Multiple Choice
A freely falling object starts from rest. After falling for 6 seconds, it will have a speed of about:
6m/s
36m/s
60m/s
12m/s
- 15. Multiple Choice
15. Joe jumps out of a helicopter. Which free body diagram(FBD) illustrates Joe's free fall motion?
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