Forces and Motion

At dinner, Hans passed the salt shaker to his sister Jessica by sliding it across the wooden table. The salt shaker gradually slowed down and stopped after moving 12 centimeters.

Why did the salt shaker stop moving?

• The salt shaker ran out of force.

• The table exerts a force that is opposite to the salt shaker's motion.

• The table absorbs force from the salt shaker.

• All objects stop moving because their natural state is to be still.

Sandra pushed a wooden block and it slid across the floor. The wooden block gradually slowed down and stopped after moving 10 meters.

Why did the block stop moving?

• The floor exerted a force that is opposite to the direction of the block's motion.

• The block ran out of force.

• The floor absorbs force from the block.

• All objects stop moving because their natural state is to be still.

A _____ is a pull or a push.

• force
• friction
• gravity
• speed

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NGSS.MS-PS2-1

Another way that force can cause the change in an object's motion is to...

• change its color.
• change its pitch.
• change its direction.
• change its spots.

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NGSS.MS-PS2-2

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

• Friction
• Gravity
• Pull
• Push

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NGSS.3-PS2-1

Which has the least friction?

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

Tags

NGSS.3-PS2-1

If forces acting on an object are balanced, then there _________ be a change in motion

• will
• will not

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NGSS.HS-PS2-1

The energy an object has because it is moving is called ______________________

• potential energy

• kinetic energy

• force

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NGSS.MS-PS3-5

The energy that is stored inside an object is called ___________.

• potential energy

• kinetic energy

• motion

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NGSS.MS-PS3-2

At what point in a collision does energy transfer occur?

• There is no such thing as a collision.

• the moment of contact

• after everything stops

• there is no transfer of energy

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NGSS.MS-PS3-1

NGSS.MS-PS3-5

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