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work done- mechanical energy

Work Done
work is done upon an object whenever a force acts on it to cause it to be displaced.
Work (A) = Force (F) x Distance covered (s)
A = F x S

work done

When an object weight 25kgf is lifted to a height of 6 meters.
Hence, the work done is :-
F = 25 kgf , S = 6m
A= 25 kgf x 6 m = 150 kgfm




The same amount of work is done while lifting a load along an inclined plane. ( Excluding friction )

work cycle

G = 5000 kgf, (S )h=1000/100 = 10 m
F = G2 = G x sin ‹ = 5000 x 1/100 = 50 kgf.
A= F x S = 50 x 10 = 500 kgfm





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