the zero of gravitational potential energy is:1)always at ground level2)arbitary3)at sea level4)at the centre of the earthwhich option is correct explain

Dear Sunny

Potential energy is not absolute it depends on reference. we can take any arbitrary reference where Potential energy is zero. it is arbitrary.

suppose we take reference at H height from ground then it means that P. E at ground is mgH less than the reference.

just difference of PE matters 

All the best.                                                           

AKASH GOYAL

AskiitiansExpert-IIT Delhi

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