Friction is a resistive force that acts to slow moving objects down and tries to stop them from sliding past each other. It always acts in the opposite direction of an object's movement and is what causes things to slow down or stop when in motion. Friction exists between surfaces in contact with each other and generates heat as it transfers motion into thermal energy while impeding further sliding or rolling.

1. What is friction?

2. Friction is a resistive force that slows things down and tries
to stop objects sliding past each other.
What is friction?

3. Friction is a resistive force that slows things down and tries
to stop objects sliding past each other.
What is friction?
friction pulling force

4. Friction is a resistive force that slows things down and tries
to stop objects sliding past each other.
What is friction?
friction pulling force
Friction always acts in the opposite direction to which an
object is moving or trying to move.

5. Friction is a resistive force that slows things down and tries
to stop objects sliding past each other.
What is friction?
What would happen if friction didn’t exist?
friction pulling force
Friction always acts in the opposite direction to which an
object is moving or trying to move.