A bird of mass 1.5 kg is flying at 8 m/s at a height of 50 m above the ground. What is its total mechanical energy

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Explanation:

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the answer is a. at the equator

i am pretty sure it is c because when people are closer together, they cannot move as freely. picture being in a mostly full elevator, for instance. the people are right next to you, and you can barely move.