Suppose a parent gives the merry-go-round another good push. This push delivers an angular acceleration of 7rad/s^2. If the radius is still 1.3m, and the total mass with the kids is 490kg, how much torque does the parent deliver?
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Depends where the kids are??? Assuming they are all on the outside then torque = I alpha =mr^2 alpha = 490 x 1.3^2 x 7 N.m