On a planet whose size is the same and mass 4 times as that of the earth, find the energy needed to left a 2kg mass vertically upward through 2m distance in joule. take g= 10m/sec²
deviammu80:
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Explanation:
ANSWER
On the planet, g′=R2G×4M
On the earth, g=R2GM
∴gg′=4
⇒g′=4g=40m/s2
Energy needed to lift 2 kg mass through 2 m distance,
E=mg′h
=2×40×2
=160 joules.
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☯ On the planet
☯ On the earth
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