Asked by Mario

The efficiency of a machine is 80% calculate the work done by a person using the machine to raise a load of 300kg through a height of 4m (take g=10/s2)
Answered by oobleck
work = force * distance
But you only get to use 80% of the work input. That means that
0.8W = 300*10*4
Answered by Agatha
I need the answer
Answered by zauntee
62500 i think
Answered by Saadatu
Efficiency=work out put/work input x 100
80/100=200 x 3 x 10/x
80x=600000
x=7500j
Answered by Oyinloye Ololade
7500j
Answered by Pretty
1500j
Answered by Pretty
300×10×4×100/80
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