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Physics for Scientists and Engineers with Modern Physics
(I) A child sitting 1.20 $\mathrm{m}$ from the center of a merry-
go-around moves with a speed of 1.30 $\mathrm{m} / \mathrm{s}$ . Calculate
$(a)$ the centripetal acceleration of the child and $(b)$ the
net horizontal force exerted on the child (mass $=22.5 \mathrm{kg} )$ .