Calculating Centripetal Acceleration and Force on Child

[natural]

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

 

[Ja4Coltrane]

correct. Good job.

 

[natural]

gee thanks for your time