Answer to Question #287987 in Field Theory for nahom

Question

THE EFFICIENCY OF A CERTAIN MACHINE IS 80 WHAT WORK IS REQUIRED TO RAISE A BOX OF MASS 200KG A DISTANCE OF 6M USE G = 10M/S²

Answer 1

Answer

Mass m=200Kg

Height h=6m

g=10m/s²

Let work done is W.

Which is given by

work = force * distance

But we only get to use 80% of the work input.

0.8W=mgh

$0.8W=200\times10\times6\\W=\frac{12000}{0.8}\\W=15000J$