P,Q, and R are three 30kg children on a merry-go-round 1.0m, 2.0m, and 3.0m from its centre. It is rotating four times each minute. Calculate the centripetal force on each child

Question

P,Q, and R are three 30kg children on a merry-go-round 1.0m, 2.0m, and 3.0m from its centre.  It is rotating four times each minute.  Calculate the centripetal force on each child

turingtest · Answer

circumference of each circle is$$C=2\pi r$$where r is the radius of the circle.
velocity is$$v=\frac CT$$where T is the time it takes (in seconds) to make one revolution.
centripital acceleration is$$a_c=\frac{v^2}r$$and centripital force is$$F=ma_c$$where m is the mass of the object moving

put these pieces together to solve your problem