A rigid rod of length and negligible mass has a ball of mass m attached to one end with its other end fixed to form a pendulum

Question

A rigid rod of length and negligible mass has a ball of mass m attached to one end with its other end fixed to form a pendulum as shown in figure The pendulum is inverted with the rod vertically up and then released Find the speed of the ball and the tension in the rod at the lowest point of the trajectory of ball l

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