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A small block of mass m = 37 g can slide along the frictionless loop-the-loop, with loop radius R = 39 cm. The block is released from rest at point P, at height h = 6.0R 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? (Your result must be in joules and include 3 digit after the decimal point. Maximum of 5% of error is accepted in your answer. Take g=9.80 m/s2.)
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