[填空题]
A merry-go-round has a may1,u 2bu/wcjwzz -ku zoxzclz25 22w,ss of v:499 j mzj;v/-e ek*yqdg wrn1640 kg and a radius of 7.50 m. How much net work is required to accelerate it from rest to a rotatiz j- :4eqrdgm/9*k;ywvvn9e jon rate of 1.00 revolution per 8.00 s? Assume it is a solid cylinder. J