How long will it take a 60kg man to climb a height of 22m if he expended energy at a rate of 0.25kW. [g = ms-2]
A
5.3s
B
34.5s
C
41.6s
D
52.8s
Verified Correct Answer: D.
Physical Principles & Numerical Solution
power = mgh
0.25 x 103 = \(\frac {60 \times 10 \times 22}{t}\)
t = 52.8 sec
Source: Myschool Past Questions Archive (Record #28371)