JEE Main Physics question
The power of a water pump is 2 kW. If g = 10 ms⁻², then the amount of water it can raise in 1 min to a height of 10 m is
Answer: (D)
Solution
Work done in 1 min = Pt = 2000×60 = 1.2×10⁵ J. Mass raised m = W/(gh) = 1.2×10⁵/(10×10) = 1200 kg = 1200 L.