A bluebird has mass of 34 grams. It flies from the ground to the top of an 8.5-m tree. What is the change in the bluebird's gravitational potential energy as it flies to the top of the tree? 2800J 290J 2.8J 280J 0.29J
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Here, mass, m = 34 grams or 0.034 kg
height, h = 8.5 m
g = 9.8
gravitational potential energy = mgh
= 0.034kg * 8.5 m * 9.8 m/s^2
= 2.83 J or 2.8 J
Thus, bluebird's gravitational potential energy at the top of the tree is 2.8 J.