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Motion And Force
Test Description: Describing motion and force
Instructions: Answer all questions to get your test result.
1) If Kim won a 400-m race in 80 s, her rate of speed was
A
2 m/s
B
20 m/s
C
5 m/s
D
10 m/s
2) A person in a head-on car collision, who is not wearing a seat belt, continues to move forward at the same speed of the car because of
A
gravity
B
inertia
C
weight
D
friction
3) Newton’s first law of motion states that an object at rest stays at rest unless a _____ acts on it.
A
strong force
B
weak force
C
net force
D
balanced force
4) The amount of gravitational force between objects depends on their
A
speed and direction
B
frictional forces
C
masses and the distance between them
D
inertia
5) The relationship among mass, force, and acceleration is explained by
A
the law of conservation of momentum
B
Newton's 1st Law of Motion
C
Newton's 3rd Law of Motion
D
Newton's 2nd Law of Motion
6) Acceleration due to gravity is
A
9.8 meters per second
B
98 meters per second squared
C
9.8 meters per second squared
D
98 meters per second
7) In the absence of air, a penny and a feather that are dropped from the same height will
A
float
B
fall at the same rates
C
fall at different rates
D
not have momentum
8) What is the force of an object that has a mass of 10 kg and an acceleration of 2 m/s2?
A
2 N
B
20 N
C
5 N
D
50 N
9) What is the rate of change of speed and/or direction?
A
gravity
B
acceleration
C
inertia
D
net force
10) What is the momentum of an object that has a mass of 10 kg and a velocity of 25 m/s?
A
2500 kg x m/s
B
2.5 kg x m/s
C
250 kg x m/s
D
25 kg x m/s
*select an answer for all questions
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