A 30-Kg Child Sitting 5

Multiple Choice

A 30-kg child sitting 5.0 m from the centre of a merry-go-round has a constant speed of 5.0 m/s. While she remains seated in the same spot and travels in a circle, the work the seat performs on her in one complete rotation is:

A) 0 J.
B) 150 J.
C) 1500 J.
D) 4700 J.
E) 46 000 J.