Frictional force

Principle

Demonstrate that sliding friction is:

• smaller than static friction

• proportional to the normal force

• a function of the nature of the contact surfaces

and

• independent of the size of the contact surface.

Benefits

• Optimised for demonstration experiments: Transformation from horizontal into vertical direction
• Very good visibility: Big devices on uniform background
• Strong Magnets (at least 10 N) allow a safe mounting and therefore a very easy handling
• Demonstrative measurement of forces with large circular dynamometers with a fixing magnet and ball-bearing pulley with two cord grooves for two measuring ranges