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##### I dont understand whether this is possible or not.

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Rover was thrown from his owner's airplane after the owner discovered that Rover was no "plane broken" (house broken or the plane.) Luckily, Rover thought to wear his parachute on the plane. He opened it immediately as her was hurled out of the door. After several seconds, Rover had drifted to a position of 200 meters above the ground. Compute (if possible) his potential energy at this location above the ground. Rover has a mass of 4 kg. Explain your answer.

Mar 21st, 2015

GPE (gravitational potential energy) = m g h, where m = 4 kg, g = 9.81 m/s^2, and h = 200 m.

GPE = 7848 = 8000 J

Mar 21st, 2015

How would I explain that?

Mar 21st, 2015

The potential energy that Rover has depends on his mass m and his height over the ground, h. The formula for potential energy is E = mgh, where g = 9.81 m/s^2 is the gravity acceleration. So,

E = mgh = 4 kg * 9.81 m/s^2 * 200 m = 7848 J (joules). However, we need to round off the result up to a single significant figure because the measured data (4 kg) has only 1 significant figure.

Mar 21st, 2015

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Mar 21st, 2015
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Mar 21st, 2015
Dec 8th, 2016
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