4.2 Force, Motion and Energy

Speed is the measure of -

• solid

• motion

• science

• gravity

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Motion is described by an object's-

• direction and mass

• speed and force

• direction and speed

• force and mass

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What causes a change in motion?

• force

• Potential Energy

• position

• Kinetic Energy

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A ball is thrown up and pauses briefly in midair. What force causes it to fall?

• electricity

• gravity

• magnets

• friction

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All moving objects have-

• frictional force

• electrical force

• potential energy

• kinetic energy

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What happens when a person applies the brakes in their car to slow down?

• Friction causes the car to travel more slowly

• Kinetic Energy causes the car to travel more slowly

• Force causes the car to travel more slowly

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What kind of energy does a pencil have laying on a desk?

• Friction

• Kinetic Energy

• Potential Energy

• Motion

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Which would have the largest mass?

• pillow

• feather

• brick

• pencil

What is a push or pull exerted by one object on another?

• friction

• force

• shape

• motion

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Rubbing your hands together causes heat because Friction

• True

• False

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