Amplify Chapter Force and Motion

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

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NGSS.MS-PS2-2

In order to change the velocity of an object, you must exert....

• speed

• friction

• mass

• a force

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Fill in the blank: A stronger force can cause _________ change in velocity.

• a smaller

• a weaker

• a greater

• no

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NGSS.MS-PS2-2

If object B is moving to the right at 2 cm/sec and object A is moving the to the left at 2 cm/sec, they have the same velocity.

• True

• False

The velocity of an object means...

• how fast the object is moving

• the amount of push/pull on an object

• the object's speed in a particular direction

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NGSS.MS-PS3-1

Friction is a force between

• two moving objects

• an object and the surface it is moving over

• a teenager and their parents

• one moving and one stationary object

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NGSS.MS-PS2-2

According to our work so far in science force means...

• a push or a pull that can change the motion of an object

• the speed and direction of an object's motion

• a deep jedi secret known only to Yoda

• to reach a conclusion using evidence and reasoning

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NGSS.MS-PS2-2

Exert means

• a result or change that happens because of an event or process

• to apply a force

• a push or a pull that can change the motion of an object

• the energy that an object has because it is moving

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NGSS.MS-PS2-1

NGSS.MS-PS2-2

How an object changes velocity depends upon...

• the direction of the force exerted

• the direction & strength of the force exerted

• the strength of the force exerted

• the original velocity

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NGSS.MS-PS2-2

Hockey rinks use ice instead of carpet due to

• exert

• mass

• velocity

• friction