Friction and Types of Friction

Define Rolling Friction

• Friction caused by two objects sliding against each other

• Friction that occurs when a solid rolls across a surface

• Friction that occurs when a solid pushes a liquid aside

• The friction of stationary objects. You must use more force to move an object experiencing this kind of friction

Define Fluid Friction

• Friction that occurs when a solid pushes a liquid or a gas aside

• The friction of stationary objects. You must use more force to move an object experiencing this kind of friction

• Friction that occurs when a solid rolls across a surface

• Friction caused by two objects sliding against each other

Define Static Friction

• Friction caused by two objects sliding against each other

• Friction that occurs when a solid rolls across a surface

• The friction of stationary objects. You must use more force to move an object experiencing this kind of friction

• Friction that occurs when a solid pushes a liquid aside

Frictions acts in the direction _____to the direction of the object's motion.

• Perpendicular

• Parallel

• Opposite

• Diagonal

Tags

NGSS.MS-PS2-2

A football player is pushing a heavy sled for workouts. What type of friction must he overcome in order to start the sled?

• Rolling Friction

• Static Friction

• Fluid Friction

• Sliding Friction?

You are pushing a refrigerator with a force of 300N. Friction is acting against you with a force of 200N. What is the net force?

• 500N

• 600N

• 1.5N

• 100N

Tags

NGSS.MS-PS2-2

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

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

• Carpet

• Polished Wood

• Ice

Rougher surfaces have ...

• greater friction

• less friction

• the same level of friction

What does friction produce?

• light

• sound

• heat

• gravity

Tags

NGSS.MS-PS3-3