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Free Fall & Vertical Projection

Total questions: 20

Worksheet time: 2hrs 40mins

Name
Class
Date
1.
What happens to the velocity of a ball as it is dropped off a cliff? 
a)
It decreases at a uniform rate 
b)
It increases at a uniform rate 
c)
It is constant 
d)
It increases at a non-uniform rate
2.
A ball is thrown up in the air with an initial velocity of 40 m/s. What is the ball's velocity after 2 seconds? 
a)
0 m/s 
b)
20 m/s traveling upward
c)
20 m/s traveling downward
d)
40 m/s traveling downward
3.
In a normal environment, why does a bowling ball and feather hit the ground at different times when dropped from the same height?
a)
They don't; they hit the ground at the same time.
b)
One is more dense than the other.
c)
One is heavier than the other.
d)
Air resistance 
4.
If you know the time an object is in the air, can you find the Vf of the object?
a)
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 Vf
b)
Yes, you would use the time the object was in the air to find the distance the object travels upward before 
c)
No, you are not given enough information
d)
No, it depends on the acceleration, which is different on the way up and on the way down.
5.
If a freely falling object were somehow equipped with a speedometer, its speed reading would increase each second by 
a)
about 5 m/s.
b)
about 10 m/s.
c)
about 15 m/s.
d)
a rate that depends on its initial speed.
6.
1.  An object free falls for 3.5 seconds. How far does it fall?
a)
120.05 m
b)
17.15 m
c)
60.03 m
d)
34.3 m
7.

A ball is thrown upwards and caught when it comes back down. In the absence of air resistance, the velocity of the ball when caught would have

a)

a magnitude less than the velocity it had when thrown upwards.

b)

a magnitude more than the speed it had when thrown upwards.

c)

a magnitude the same as the speed it had when thrown upwards and would be moving in the opposite direction.

d)

a magnitude the same as the speed it had when thrown upwards and would be moving in the same direction.

8.
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.
a)
I only
b)
III only
c)
I and III
d)
I, II, and III
9.
Which would hit the ground first if dropped from the same height in a vacuum—a feather or a metal bolt?
a)
the feather
b)
the metal bolt
c)
They would hit the ground at the same time.
d)
They would be suspended in a vacuum.
10.
When an object falls in physics world, what happens?
a)
It accelerates at a constant rate until it hits the ground
b)
It accelerates at a non-constant rate until it hits the ground
c)
It accelerates at a constant rate until it reaches terminal velocity
d)
It accelerates at a non-constant rate until it reaches terminal velocity
11.
What is the distance a ball falls after 1,2,3,4,5 seconds (assume g is rounded to 10 m/s2)?
a)
10, 20, 30, 40, 50 m (meters)
b)
5, 20, 45, 80,125 m (meters)
c)
5, 10,15, 20, 25 m (meters)
d)
10, 25, 60, 90,120 m (meters)
12.
What is the 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)?. 
a)
10, 20, 30, 40, 50 m/s
b)
5, 10, 15, 20, 25 m/s
c)
5, 20, 45, 80,125 m
d)
10,10,10,10,10 m/s
13.
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)
a)
5,10,15, 20, 25 m/s2
b)
10, 20, 30, 40, 50 m/s2
c)
5, 20, 45, 80, 125 m/s2
d)
10,10,10,10,10 m/s2
14.
A pumpkin is dropped from a 35 m building. What is its initial velocity (vi)?
a)
9.8 m/s2
b)
35 m
c)
0 m/s
d)
9.8 m/s
15.
A freely falling object starts from rest. After falling for 6  seconds, it will have a speed of about 
a)
6m/s
b)
30m/s
c)
60m/s
d)
300m/s
16.
If you throw a baseball straight up, what is its velocity at the highest point?
a)
9.8 m/s2
b)
9.8 m/s
c)
0 m/s2
d)
0 m/s
17.

If you throw a baseball straight up, what is its acceleration at the highest point?

a)

-9.8 m/s2

b)

-9.8 m/s

c)

0 m/s2

d)

0 m/s

18.

If an object is dropped from a cliff of 100m, what are your 'givens' you can start with?


SELECT ALL THAT APPLY

a)

d = 100 m

b)

vi = 0

c)

t = 100 s

d)

a = 9.8 m/s2

e)

vf = 0

19.

The acceleration of gravity is always directed:

a)

upward

b)

downward

c)

it depends which way your object is moving

20.

A pumpkin is thrown downward off a building on earth with an initial velocity of 8 m/s downward and falls for 4 seconds. What is the final velocity of the pumpkin?

a)

47.2 m/s

b)

31.2 m/s

c)

-31.2 m/s

d)

-47.2 m/s

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