WAEC - Physics (1989 - No. 10)
An engine raises 1000kg of water through a height of 60m in 20s. What is the power of the engine? (Take g = 10ms-2>).
120,000 W
30,000 W
333 W
300 W
30 W
Explicació
P = mgh/t = (1000 \(\times\) 10 \(\times\) 60) \(\div\) 20 = 30,000 W.