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## Homework Statement

A child (mass=25kg) moves with a speed of 1.50ms-1 when 7.8m from the centre of a merry-go-round. Calculate

a) the cetripetal acceleraton of the child

b) th net horizontal force exerted on the child

## Homework Equations

centripetal acceleration = v2/r

Fc=mv2/r

## The Attempt at a Solution

centripetal acceleration = (150)2(squared)/7.8

=0.29m/s2

do i work out the horizontal force exerted on the child by using Fc=mv2/r?

25*(150)2(squared)/7.8 =7.21*10^4 N