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A train traveling at a constant speed of 20.8 m/s goes around a curve on horizontal...

A train traveling at a constant speed of 20.8 m/s goes around a curve on horizontal ground. A chandelier of unknown mass, suspended from the ceiling by a chain, swings out to an angle of 12.2 (with respect to vertical) throughout the turn.

(a) Draw a free-body diagram of the chandelier during the turn

(b) Calculate the radius of curvature of the curve, in m.

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