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Sahay Sir > Question Answers > Cengage JEE Mains Physics by B.M Sharma > Chapter 7 - Work, Energy and Power > An engine pumps water continuously through a hole. Speed with which water passes through the hole nozzle is v and k is the mass per unit length of the water jet as it leaves the nozzle. Find the rate at which kinetic energy is being imparted to the water.

An engine pumps water continuously through a hole. Speed with which water passes through the hole nozzle is v and k is the mass per unit length of the water jet as it leaves the nozzle. Find the rate at which kinetic energy is being imparted to the water.

A man M1 of mass 80kg runs up a staircase in 15s. Another man M2 also of mass 80kg runs up the same staircase in 20s. The ratio of the power development by then will be: