A merry-go-round starts from rest and reaches the angular, Ask an Expert

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A merry-go-round starts from rest and reaches the angular speed of 4 rpm in the first two minutes. What would be the angular acceleration of the merry-go-round in rpm/min?

A spring is hanging from a ceiling with 50g mass attached. When the mass is pulled down from the equilibrium and released, it oscillates with 0.4s period. The spring constant is equal to?

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