Force and Motion

An object in motion will stay in motion unless what happens?

•  a force acts on it

•  it becomes frozen

•  it decides to stop

•  it falls asleep

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 Gravity is a natural force that _____ all objects towards the center of earth.

• pushes

• pulls

• rotates

• spins

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The measure of how far an object has traveled?

• direction

• speed

• distance

• mass

 Gravity and friction are examples of _______.

• motion

• forces

• simple machines

• distances

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What will happen when a light-weight object and a heavy object run into each other?

• They bounce away equally.

• The small object bounces backwards.

• The large object bounces backwards.

•  The small object becomes part of the large one.

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A car is rolling on a level street. What can make the car stop moving?

• a force that pushes straight down on it

• A force that pushes the same direction as the car

• A force that pushes the opposite of the direction that the car is moving.

• nothing

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NGSS.3-PS2-1

 A ball is thrown up into the air.  What will the force of gravity cause the ball to do?

• Speed up as it travels higher and higher

• Slow down as it falls

• Change direction and come back down

• Inertia keeps it moving forward

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The force that pulls falling objects toward Earth is?

• gravity

• friction

• acceleration

• motion

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During a game of tennis, one player hits the ball with the racquet. Then the other player hits it back. As the ball is hit back and forth, which best describes the force acting on the ball?

• The ball continues to slow down each time it is hit

• The ball continues to speed up as it is hit

• It stops

• The ball changes direction each time it is hit.

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What is a change in an object's position over time?

• gravity

• motion

• force

• speed

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