Question

A boy is swing a toy on a piece of string in a vertical circle. The toy has a mass of 150g and the radius of the circle is 0.8m. An othe boy swings the toy with a linear velocity of 3.5m/s. Workout the tension in the string at the top of the circle at the bottom of the circle and halfway between the top and the bottom of the circle

Answer 1

Ac = v^2/R
at top T = m(v^2/R - g)
at middle T = m v^2/R
at bottom T = m (v^2/R + g)
note - at top when v^2/r= g, string goes slack, any slower and toy hits your head :)

Answer 2

Physic