[填空题]
A merry-go-round has a mass of 1640 kga)fpjj ct-t -- and arxc5ueeydu , k.6vky+ c4s3 rvet7*l3 radius of 7.50 m. How much net work is required to accelerate it from rest to a rotation rate of 1.00 revolution . +cxrleck ,yv 3r7su5t6yeuk*3v4d eper 8.00 s? Assume it is a solid cylinder. J