A child pushes a merry-go-round with a force of 80.0 N at an angle tangent to th

Question

A child pushes a merry-go-round with a force of 80.0 N at an angle tangent to the circle (that is, perpendicular to a radius). If the child pushes it through exactly one full circle, and the merry-go-round has a radius of 1.15 m, how much work does she do? A child pushes a merry-go-round with a force of 80.0 N at an angle tangent to the circle (that is, perpendicular to a radius). If the child pushes it through exactly one full circle, and the merry-go-round has a radius of 1.15 m, how much work does she do?

Explanation / Answer

Work done by the child on the merry-go-round,

W = F.s = F * (2r) * cos0o = F(2r)

=> W = 80.0 * (2 * 1.15) = 578 J

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