Question: A small block with mass m slides without friction on the inside of a vertical circular track that has radius R . What minimum speed

A small block with mass m slides without friction on the inside of a vertical circular track that has radius R . What minimum speed must the block have at the bottom of its path if it is not to fall off the track at the top of its path? Express your answer in terms of some or all of the variables m , R , and acceleration due to gravity g

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