An object of mass m is lifted to a height h and its gravitational potential energy is 80J. Determine by how much will its gravitational potential energy change if its mass is tripled and its height is halved?
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Answer:
480J
Explanation:
formula of gravitational potential energy is
= -GMm/R
when mass is tripled and height is halved
potential energy becomes = GM3m/R/2
= 6GMm/R
GMm/R = 80J
then changed potential energy is = 80×6 =480J
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