Friction

Front

What is friction?

Back

Friction is a force that opposes the relative motion of two surfaces in contact.

Front

In which direction does friction act in relation to movement?

Back

Friction acts in the opposite direction of movement.

Front

True or False: The amount of friction depends on the weight of the object pressing on a surface.

Back

True

Front

What type of friction must be overcome for an object to start moving?

Back

Static friction.

Front

What happens to a marble traveling at constant velocity in the absence of friction?

Back

The marble would remain at constant speed.

Front

How can friction be reduced?

Back

Friction can be reduced by reducing the force between surfaces, decreasing surface roughness, or using lubricants like wax, grease, or oil.

Front

What is static friction?

Back

Static friction is the force that must be overcome to start moving an object at rest.

Front

What is sliding friction?

Back

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

Front

What is rolling friction?

Back

Rolling friction is the force that opposes the motion of a rolling object.

Front

What is fluid friction?

Back

Fluid friction is the resistance encountered by an object moving through a fluid (liquid or gas).