a body of mass 2kg is thrown vertically upwards with an intial velocity of 20m/s . what will be it's potential energy at the end of 2s?
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d=v*t
=20*2
=40m
pe=mgh
2*9.8*40
=784j
=20*2
=40m
pe=mgh
2*9.8*40
=784j
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