A pump raises $200$ kg of water per minute through a vertical height of $15$ m. Calculate the power of the pump. (Take $g = 10$ m s$^{-2}$.)
A$50$ W
B$30000$ W
C$3000$ W
D$500$ WCORRECT
JUPEBPhysicsWork, Energy and Power
AI
Toaster Teacher
Why the answer is D, and why the others tempt you.
Work done per minute $= mgh = 200 \times 10 \times 15 = 30000$ J. Power $= \dfrac{30000}{60} = 500$ W. Forgetting to convert the minute to seconds leaves 30000 W.
Want this in Pidgin, Yoruba, Igbo or Hausa? Sign up free →
Practice more Physics questions
JUPEB Physics has thousands more questions like this — with Worked answers on every one.