a train is travelling at constant speed 20m/s round an unbanked curve with a radius of 100 m. inside the train hangs a pendulum hanging from the ceiling
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The train is moving in a circular path. So, it is in an accelerated (non-inertial) frame of reference. Hence, a psuedo (centrifugal) force equal to mv2/R is to be acted on the pendulum as show in the figure. IF T is the tenion in the string in the position.
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