Friction

To test friction on the same object,

• one smooth surface is best

• one rough surface is best

• different surfaces are needed

• only use a slope

Aiden sits halfway down a grassy slope. What force stops him sliding down?

• weight

• gravity

• mass

• friction

On which surface will a toy sled travel the least distance?

• carpet

• polished wood

• ice

• pavement

Give an example of how to increase friction on an icy sidewalk.

Air resistance and water resistance are both types of friction.

• true

• false

• neither

Bryce is pushing a heavy box. Which best describes what is occurring?

• there is no friction acting on the box

• mass is being applied to the box

• friction is being applied to the box

• there is no gravity acting on the box

Tags

NGSS.MS-PS2-2

Which of the following statements is true?

• Friction is a force that only occurs on rough surfaces

• Friction is a force that only occurs when surfaces touch each other

• Friction is a force that only occurs between solids

• Friction is a force that only occurs in winter or during precipitation

How does friction affect speed?

• more friction increases speed

• more friction decreases speed

• less friction decreases speed

• less friction does not affect the speed of a moving object

Rougher surfaces have...

• less friction

• greater friction

• no friction

• the same level of friction

Noah and Timothy are kicking a ball back and forth. Timothy kicks the ball in Noah's direction, but the ball stops just before it reaches Noah. Which most likely caused the ball to stop?

• friction

• gravity

• change in shape of the ball

• change in the mass of the ball

Tags

NGSS.MS-PS2-2