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A park merry-go-round consists of a 240-kg circular wooden platform 4.00 m in diameter. Four children running

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A park merry-go-round consists of a 240-kg circular wooden platform 4.00 m in diameter. Four children running alongside push tangentially along the platform’s circumference until, starting from rest, the merry-go-round reaches a steady speed of one complete revolution every 2.8 s.

(a) If each child exerts a force of 26 N, how far does each child run?

(b) What is the angular acceleration of the merry-go-round?

(c) How much work does each child do?

(d) What is the kinetic energy of the merry-go-round?

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