Physics 3 - 13.2 Movement in a circle

Movement in a circle and centripetal force

Galileo - Everybody continues to move with a constant speed unless acted on by a       resultant force

From this Newton established his first law of motion.

An object that is moving in a circle is said to be accelerating, even if there is no speed change, because the velocity is constantly changing.

A net inward force is needed to provide this acceleration. This 'centripetal' force, f, always acts towards the centre…