Friction

Friction is an example of _____________

• contact force

• non contact force

• both of these

• none of these

The direction of force of friction is always _____ to the direction of motion

• same

• opposite

• unchanged

• none of these

Without friction, an object in motion would never stop.

• true

• false

Tags

NGSS.MS-PS2-2

Frictional force depends on ____

• surface area in contact

• roughness of surface

• both a and b

• none of the above

Wheels on a skateboard most likely experiences-

• Rolling Friction
• Sliding Friction
• Fluid Friction
• Static Friction

Tags

NGSS.MS-PS2-2

Sally experiences-

• Rolling Friction
• Sliding Friction
• Fluid Friction
• Static Friction

Wheels of a shopping cart experience-

• Rolling Friction
• Sliding Friction
• Fluid Friction
• Static Friction

Tags

NGSS.MS-PS2-2

Swimming fish experience-

• Rolling Friction
• Sliding Friction
• Fluid Friction
• Static Friction

Tags

NGSS.MS-PS2-2

What type of friction is not moving?

• static
• sliding
• fluid
• rolling

How can friction be reduced?

• reduce the force acting between the 2 surfaces
• reduce the roughness of the 2 surfaces coming in contact
• use wax, grease or oil
• all of the above are ways of reducing friction

Tags

NGSS.MS-PS2-2