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…