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