A small block of mass m=0.032kg can slide along a frictionless loop-the-loop, with the loop radius R=12cm. The block is released from rest at point…

A small block of mass m=0.032kg can slide along a frictionless loop-the-loop, with the loop radius R=12cm. The block is released from rest at point P, at height h=5R above the bottom of the loop. How much work does the gravitational force do on the block as the block travels from point P to point Q?

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