# Motion And Force: Question Preview (ID: 1299)

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If Kim won a 400-m race in 80 s, her rate of speed was
a) 10 m/s
b) 5 m/s
c) 2 m/s
d) 20 m/s

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) inertia
b) weight
c) friction
d) gravity

NewtonвЂ™s first law of motion states that an object at rest stays at rest unless a _____ acts on it.
a) balanced force
b) strong force
c) weak force
d) net force

The amount of gravitational force between objects depends on their
a) frictional forces
b) inertia
c) speed and direction
d) masses and the distance between them

The relationship among mass, force, and acceleration is explained by
a) Newton's 1st Law of Motion
b) Newton's 2nd Law of Motion
c) Newton's 3rd Law of Motion
d) the law of conservation of momentum

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

In the absence of air, a penny and a feather that are dropped from the same height will
a) fall at different rates
b) float
c) fall at the same rates
d) not have momentum

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) 5 N
c) 20 N
d) 50 N

What is the rate of change of speed and/or direction?
a) acceleration
b) gravity
c) net force
d) inertia

What is the momentum of an object that has a mass of 10 kg and a velocity of 25 m/s?
a) 2.5 kg x m/s
b) 250 kg x m/s
c) 2500 kg x m/s
d) 25 kg x m/s

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