Question

A boy is swinging a toy on a piece of string in a vertical circle. The toy has a mass of 150 g and the radius of the circle is 0.8 m.
a)he swings the toy with a linear velocity of 2 m/s. Will the toy move in a circle?

Answer 1

centripetal force ... m v^2 / r = .15 * 2^2 / .8 = ? N

gravitational force ... m g = .15 * 9.8 = ? N

a) if the centripetal force is less than the gravitational force
... the toy will NOT move in a circle