Forces and Motion

A _____ is an interaction between two objects.

• force

• friction

• gravity

• speed

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What force moves an object away from you?

• pull
• push
• gravity
• Jedi force

_____ is the force that slows and stops motion between touching objects.

• Friction
• Gravity
• Pull
• Push

Which has the least friction?

• snowboard on a snowy hill
• running on the playground
• sandpaper on wood
• a racer on a track

How does friction help us move from place to place?

• Friction does not help us.
• Friction keeps us from slipping and sliding.
• Friction only helps cats.
• Friction makes us slip and fall.

Why do air planes and race cars have sleek shapes?

• to reduce friction from air resistance
• to increase air resistance
• to look more appealing than cats
• so people will buy them

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What keeps the Moon in orbit around Earth?

• Earth's rotation.
• Earth's atmosphere.
• Earth's gravity.
• Earth's shape.

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The term for when an object speeds up, slows down, or changes direction

• Speed
• Velocity
• Acceleration
• Newtons

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18 km/s in a northerly direction is an example of

• velocity
• Speed
• acceleration
• momentum

Which graph best represents a graph of a car travelling down a freeway at a CONSTANT speed?

• A
• B
• C
• D

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