[填空题]
A merry-go-round has a mass p29 b2km9orfb- vq zs8of 1640 kg c,dv (396u,dptjq h hf dy0nc/and a radius of 7.50 m. How much net work is required to accelerate it from rest to a rotation rate of 1.00 revolution per 8.00 s? Assume it is a solid cy9d36fv nj0/h ,q tcu,hdcy pd(linder. J