Friction

Front

What is friction?

Back

Friction is the force that acts in the opposite direction of motion when two surfaces come in contact.

Front

How can you determine which student used the most force to push a ball?

Back

By comparing the distances that the ball rolled.

Front

Which car requires the most force to start moving?

Back

A car with a mass of 2000 kilograms.

Front

Why did the kickball move but the bowling ball did not on a windy day?

Back

The kickball has less mass, so it was easier to move.

Front

How does friction affect speed?

Back

More friction decreases speed.

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

What happens to friction when surfaces are rough?

Back

Rough surfaces create more friction compared to smooth surfaces.

Front

What is the relationship between mass and force needed to move an object?

Back

More mass requires more force to move the object.

Front

What is an example of friction in everyday life?

Back

Walking is an example of friction; our shoes grip the ground to prevent slipping.