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there is a vertical circular loop of radius 0.24 m at the bottom of the track a) what is the minimum speed that the car must have at the top of the loop to stay on the track? b) what is the corresponding speed at the bottom of the loop for this to occur? help thanks

there is a vertical circular loop of radius 0.24 m at the bottom of the track a) what is the minimum speed that the car must have at the top of the loop to stay on the track? b) what is the corresponding speed at the bottom of the loop for this to occur? help thanks