1.

a tube wells pumps out 3000 Kg of water per minute , if water is coming out with a velocity of 5m/s , what is the power of the pump ?

Answer» velocity ( v ) = 5 m/s 
mass of the water pumped =3000/60 
                                   m     = 50 kg/s
K.E. of water coming out per second = 1/2mv^2
                                                       = 1/2* 50 * 25 = 625 JOULE per second
                                                        = 625 WATT .






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