Static and Kinetic Friction

Front

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

Back

opposite

Front

Which type of friction is generally greater, static or kinetic friction?

Back

static

Front

What is friction?

Back

Force that opposes motion

Front

What is the coefficient of static friction if it takes 44 N of force to move an 86-N box on a horizontal surface?

Back

0.51

Front

What is the formula to calculate the force of friction?

Back

force of friction = coefficient of friction * normal force

Front

Define static friction.

Back

The frictional force that prevents two surfaces from sliding past each other when at rest.

Front

Define kinetic friction.

Back

The frictional force that opposes the motion of two surfaces sliding past each other.

Front

What factors affect the force of friction?

Back

The nature of the surfaces in contact and the normal force acting between them.

Front

What is the coefficient of kinetic friction?

Back

A dimensionless value that represents the ratio of the force of kinetic friction to the normal force.

Front

How does surface roughness affect friction?

Back

Rougher surfaces generally increase friction due to greater interlocking of surface irregularities.