A parent pushes a balanced frictionless playground merry-go- round. The parent exerts a force tangent to the merry-go- round resulting in a torque of 240 N· m; the distance between the center of the merry-go-round and the point of application of the force is 1.6 m.

(a) Is the merry-go-round in equilibrium?

(A) Yes, for both translational and rotational motion

(B) Only for translational motion

(C) Only for rotational motion

(D) No, not for translational or rotational motion

(b) What, if any, is the magnitude of the horizontal force exerted by the merry-go-round axle on the merry-go-round?

(A) 384 N (B) 240 N

(C) 150 N (D) There is no force.

Shane Macguire , 9 Years ago

Grade upto college level