A man of mass 50kg ascends a flight of stairs 5m high in 5 seconds. If acceleration due to gravity is 10ms-2, the power expended is?

Toyinnifemi

4 years ago

Power= workdone/time
=Mgh/time
=50*10*5/5
=2500/5
=500W
The answer is E

Babliwa

3 years ago

They got the answer here but for their CP software version they gave the answer as 100w, very confusing

doctorceejay

4 years ago

The answer in the cbt app space is wrong, I was failed even as the option I picked is E

profjohnbull

4 years ago

The formula is p=f*d/t but you did not divide by the time so the answer is meant be 100