Forces Friction

On which surface will a toy car travel the furthest?

• Carpet

• Polished Wood

• Ice

Tags

NGSS.MS-PS2-2

Rougher surfaces have ...

• greater friction

• less friction

• the same level of friction

Which of the following statements is false?

• Friction can only slow things down

• Friction is never useful

• Friction can stop things from moving

Ways to reduce frictional force

• use lubricants

• use grease

• use magnesium carbonate chalk powder

• use rollers and ball bearings

The motion of an object will change when an unbalanced force is applied to it

• true

• false

Tags

NGSS.MS-PS2-2

What force ultimately slows the roller coaster to a stop?

• Magnetic

• Applied

• Normal

• Friction

Wheels on a skateboard most likely experiences...

• rolling friction

• sliding friction

• fluid friction

• static friction

Which of the following is an example of friction that is helpful?

• Tires from a car on the road.

• Tread on the bottom of your shoes.

• Brakes used on a bike.

• All are examples that are helpful.

Friction can be increased by increasing the __________ of the surfaces in contact.

• roughness

• smoothness

• none of the above

• area

A _____________ is a push or pull on an object.

• friction

• force

• gravity

• magnet

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2