Why trainers grip well

Why do some shoes or socks slide more easily on the floor? If a shoe won't slide on the floor when you exert a force on it there must be an equal force opposing the motion. This force is friction and varies depending on the materials involved.

22 November 2012

2 minutes

This clip is from

Science in Action—Physical Processes

The force, pressure and surface area of stinging nettles
Duration: 02:07
Why do you feel lighter in water?
Duration: 00:46
Resistance of different materials
Duration: 01:11
The relationship between force, pressure and surface area
Duration: 02:51

What happens when you heat a bimetallic strip?—Energy across the Curriculum
Duration: 00:41
Neutralising acids and alkalis—Materials and Their Properties
Duration: 00:32
The force, pressure and surface area of stinging nettles—Physical Processes
Duration: 02:07
Why do you feel lighter in water?—Physical Processes
Duration: 00:46