friction force

The friction force is a contact force.

• TRUE

• FALSE

Rougher surfaces have ...

• greater friction
• less friction
• the same level of friction

Without friction, an object in motion would never stop.

• true

• false

When we rub our hands together _________.

• frictional force works between them

• energy is released

• our hands become warm

• all off the above

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

A contact force between two surfaces in touch is called....................

• gravity

• friction

• inertia

Which surface has more friction force?

• rough surface

• smooth surface

• both together

The effect of the friction force is to.................the speed of an object.

• speed up

• slowdown

Tags

NGSS.MS-PS3-5

Which object would have more friction force?

• light object

• heavy object

• long object

What causes an object to fall faster?

• Smaller surface area

• Larger surface area

• If it has a parachute

Tags

NGSS.MS-PS2-4

The larger the surface area of the moving object, the ___________ air resistance there is.

• Less

• More

• Longer