[accordions autoHeight='true'] [accordion title="1. Rotational Kinematics"] Angular displacement is defined as the angle an object turns with respect to the centre of a circle. where s is the arc and r is the radius of the circle. One radian is the angular displacement when the arc length is equal to the radius of the circle.

# Tag: centripetal force

## Cardboard Boomerang

A indoor boomerang can be constructed using 3 strips of cardboard put together. Throwing it may require some practice though but when you get the hang of it, it can inject great fun into your lesson. You can explore using different types of material to get the best boomerang. Materials Cardboard about 1 mm thick,