. A pump is used to lift 500kg of water from a depth of 80m in 10s. Calculate:

A pump is used to lift 500kg of water from a depth of 80m in 10s. Calculate:

(a) The work done by the pump,

(b) The power at which the pump works, and

(c) The power rating of the pump if its efficiency is 40%.

(Take g= 10m s^-2).

Best Answer

Work done in raising a 500kg mass to a height of 80m against the force of gravity is:

(a)W = mg x h= mgh

W= 500 x 10 x80 =4 x10⁵J

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