Practicing Success

Target Exam

CUET

Subject

Physics

Chapter

Work Power Energy

Question:

An engine pumps water through a hose pipe. Water passes through the pipe and leaves it with a velocity of 2 m/s. The mass per unit length of water in the pipe is 100 kg/m. What is the power of the engine?

Options:

800 W 

400 W

200 W

100 W

Correct Answer:

800 W 

Explanation:

P = \(dv^3\rho\)

   = \(mu_v^3\)

\(mu = 100 ; v = 2\)

P = 800 W