The work done against gravity in moving a box with a mass of 5 kilograms through a height of 3 meters is approximately ......... ?

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Answer 1 · 2017-08-16T12:42:36

see below

When we lift a box through some height, its potential energy increases which is equal to the work done on it to raise it.

Change in potential energy = work done

#Delta U =W=mgh=5*9.8*3=147# #J#