Question

An engine raises 120kg of water through a height of 40m in 30s what is the power of the engine?(g=10m/s2​

Answer 1

4800J/s

Explanation:

m = 120kg

H = 40m

t = 30sec

Input energy = 120 × g × H = mgn

Ei = 120 × 40 × 30 = 144000J

Energy per sec, E1 = 144000 ÷ 30 = 4800J/s

Power input = 4800J/s