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Free Fall Review
Free Fall Review
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A #physics #review game for #freefall
Flashcards
30 cards
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Practice quiz
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Questions
30
Answers
1
What is meant by the term "freefall?"
neither gravity nor air resistance act on the object
only air resistance acts on the object
only gravity acts on the object
both gravity and air resistance act on the object
2
An object in freefall has a changing
neither velocity nor acceleration
velocity
acceleration
both velocity and acceleration
3
An object is NOT accelerating if it is
slowing down
at a constant velocity
speeding up
changing directions
4
An object in freefall
could be moving upward or downward
none of the above
must be moving upward
must be moving downward
5
The MKS unit for DISTANCE is the
meter
inch
centimeter
yard
6
For this freefall formula, what is the order of mathematical operations?
multiply 2 and d, divide by g, then square root that value
square root of 2, multiply that value by d, then divide by g
multiply 2 and d, square root 2d, then divide by g
divide 2 by g, square root that value, then multiply by d
7
In freefall, objects fall at a constant
distance each successive second
velocity
speed
acceleration
8
Which of the following objects are in freefall?
A baseball player sliding into home plate.
A hockey puck sliding across the ice.
A GPS satellite orbiting the Earth
A skydiver falling with the parachute open.
9
How far has an object in freefall dropped from rest traveled after 2 seconds?
5 m
20 m
10 m
1 m
10
A ball is thrown upward. at its peak, the acceleration equals
15 m/s/s
0 m/s/s
10 m/s/s
5 m/s/s
11
A baseball player jumps the catch a ball. Once his feet leave the ground, his acceleration
is constantly 10 m/s/s
depends on the initial velocity
is only 10 m/s/s initially, and changes after that
varies throughout the jump
12
In this freefall formula, under what conditions can it be used to solve a problem?
an object thrown upward
an object thrown downward
an object launched at an angle
an object dropped from rest
13
An object dropped from rest will fall
a smaller distance than the second before
a larger distance than the second before
the same distance as the second before
with the same average speed as the second before
14
A ball in free fall is thrown upward and falls back down. The speed of the ball when caught is ...
cannot be determined because of air resistance
equal to the initial speed
more than the initial speed
less than the initial speed
15
What is the acceleration of gravity (g) on Earth's surface?
10 m/s/s
20 m/s/s
5 m/s/s
0 m/s/s
16
An object in free fall has a speed that changes by this amount each second
about 10 m/s
about 15 m/s
a variable amount
about 5 m/s
17
Objects in freefall experience the
force of gravity
force of friction
force of air resistance
none of the above
18
The MKS unit for TIME is the
minute
parsec
hour
second
19
The MKS unit for SPEED is the
meter per second squared
meter per second
mile per hour
mile per hour squared
20
How far has an object in freefall dropped from rest traveled after 3 seconds?
30 m
45 m
10 m
90 m
21
The acceleration due to gravity on the moon is ______ the acceleration due to gravity on Earth.
greater than
less than
equal to
nonsense, there is no gravity on the moon!
22
How far has an object in freefall dropped from rest traveled after 1 second?
5 m
10 m
20 m
1 m
23
Acceleration is best defined as the rate at what happens?
speed changes
velocity changes
velocity decreases
velocity increases
24
The MKS unit for ACCELERATION is the
mile per hour squared
meter per second
meter per second squared
mile per hour
25
A ball is thrown straight upward. At its peak, the ball's speed is
10 m/s/s
0 m/s
10 m/s
0 m/s/s
26
For an object dropped from rest, how fast will it be going after 3 seconds?
3 m/s
30 m/s
0 m/s
10 m/s
27
In this freefall formula, the "squared" is applied to which numbers or variables?
the t
the g
all three
the one half (1/2)
28
A ball is thrown straight upward. At its peak, the ball's acceleration is
0 m/s/s
10 m/s/s
10 m/s
0 m/s
29
A ball thrown up is in the air for a total time of 12 seconds. The time to reach its peak is...
24 seconds
12 seconds
6 seconds
5 seconds
30
A cannon is launched upward at a speed of 20 m/s. Its total time in the air is
5 seconds
2 seconds
4 seconds
3 seconds
