BBB

A merry-go-round has a mass of 1580 kg and a radius of 7.25m. How much net work is required to accelerate it from rest to a rotation rate of 1 revolution per 7.1s? Assume it is a solid cylinder.

Think of it as a harmonic oscillaton, and then find k', which does not equal k. After that, you can find the period( T) of the motion, what's the relation between t(x_0->x_1) and T.

Mocha is still correct in august 2024