A machine of efficiency 80% is used to raise a load of body of mass 75kg through a vertical height of 3m in 30seconds.Calculate the power input.

Answer 1

P = W/t = mgh/t = 75*9.8*3/30
80% eff means divide above by 0.8

Answer 2

E=Work done/txinput x100
80=75*10*3*100/30input
Cross multiply
80x30input =225000
2400input =225000
Input =225000/2400
Input =93.75

Answer 3

An inclined plane of angle 15is used of 2m .if the plane is 75% efficiency calculate the velocity ration of the plane and work done on the load

Answer 4

Yes

Answer 5

Yes that's the question