Question

The average power required to lift a 100 kg mass through a height of 50 metres in approximately 50 seconds would be

• A. 50 J/s
• B. 5000 J/s
• C. 100 J/s
• D. 980 J/s

Answer 1

The correct option is D

980 J/s

$P=\frac{mgh}{t}=\frac{100\times 9.8\times 50}{50}=980J/s$