Friction: Applications of Newton's Laws 
Angle of Repose
PIRA Class: 1K20.35

Purpose
Note the change in force required to pull on a block of wood as the 'angle of pull' varies.

Description
An incline plane is lifted until a block begins to slide.
VARIATION: Use a kitchen spring scale to measure the component of the gravitational force on the block along the direction of the ramp

Equipment
Friction Block (Dynamic track accessories) or Pet Rock, Spring Scale or kitchen scale
Support Equipment
Dynamics Track or long ramp Masses