Friction & Coefficient of Friction

Front

Friction is a force that acts in an ___________ direction of movement.

Back

opposite

Front

What type of friction is not sliding?

Back

static

Front

A 2.0-N force acts horizontally on a 10-N block that is initially at rest on a horizontal surface. The coefficient of static friction between the block and the surface is 0.50. What is the magnitude of the frictional force that acts on the block?

Back

2 N

Front

A 27.6 kg block is pulled along a rough level surface at constant velocity by the force. The coefficient of kinetic friction is 0.30, what is the strength of P?

Back

81 N

Front

There are 25N of friction that keep a 10kg brick moving at a constant rate. What is the coefficient of friction?

Back

0.25

Front

Define the coefficient of friction.

Back

The coefficient of friction is a numerical value that represents the frictional force between two objects divided by the normal force acting on them.

Front

What is static friction?

Back

Static friction is the force that keeps an object at rest and prevents it from starting to move.

Front

What is kinetic friction?

Back

Kinetic friction is the force that opposes the motion of two surfaces sliding past each other.

Front

Explain the difference between static and kinetic friction.

Back

Static friction acts on objects that are not moving, while kinetic friction acts on objects that are sliding.

Front

What factors affect the coefficient of friction?

Back

The coefficient of friction is affected by the materials in contact and the surface roughness.