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A block weighing 20 N is lifted 6 m vertically upward. Calculate the potential energy stored in it. (120 J)
Solution:
Weight of the block = W = 20 N
Height = h = 6 m
Potential energy = P. E. =?
P.E. = mgh
We know that w = mg
P.E. = $(mg) \times h$
Thus, P.E. = $(2 \times 10)\times 6$
P.E. = 120 J