A child sitting 1.10m from the center of a merry-go-round moves with a speed of 1.15m/s^2 . (a)Calculate the centripetal acceleration of the child. (b)Calculate the net horizontal force exerted on the child. ( mass= 34.0kg ) For part a I used the formula Ar=(v^2/r) (b) for part b I thought I had to multiply 1.15 m/s with 34.0kg to get the answer in Newtons! But the online hw system said I was "not quite right." and that I might have made a calculation mistake? :O Any opinions on how to correct this??

Question

A child sitting 1.10m  from the center of a merry-go-round moves with a speed of 1.15m/s^2 . (a)Calculate the centripetal acceleration of the child. (b)Calculate the net horizontal force exerted on the child. ( mass= 34.0kg ) For part a I used the formula Ar=(v^2/r) (b) for part b I thought I had to multiply 1.15 m/s with 34.0kg to get the answer in Newtons! But the online hw system said I was "not quite right." and that I might have made a calculation mistake? :O Any opinions on how to correct this??

goformit100 · Answer

@dpaInc

anonymous · Answer

No, you need to multiply the acceleration by the mass to get the force (not the velocity).

anonymous · Answer

Oh, I see now! Thank you very much!