ashna
On a planet whose size is same and mass 4 times as that of our earth , find the amount of work done to lift 3 kg mass vertically upwards through 3 m distance on the planet. The value of g on the surface of earth is g=10 m/s^2
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mayankdevnani
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mass=4times of earth=4*3=12kg
mayankdevnani
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ok @ashna
mayankdevnani
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work done=potential energy
mayankdevnani
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potential energy=mass*gravity*height
mayankdevnani
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P.E=12*10*3=120*3=360J
mayankdevnani
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so work done=360J
mayankdevnani
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got it @ashna
ashna
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yea :)
ty !
mayankdevnani
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right @ajprincess