A man of mass 50kg ascends a flight of stairs 5m high in
5seconds. If acceleration due to gravity is 10ms -2, the power of
the man is?
P = work/time = mgh/t = 50*10*5/5 = 500W
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I don't understand
Aman of mass 50kg ascends a flight of stairs 5m
I don't understand
I don't understand
Need
P=work/time=mgh
To calculate the power of the man, we need to use the formula:
Power = Work / Time
First, let's calculate the work done by the man. The work done is equal to the force applied multiplied by the distance moved. The force applied can be found using Newton's second law, which states that force is equal to the mass multiplied by the acceleration.
Force = mass * acceleration
Force = 50kg * 10ms^-2
Force = 500N
The distance moved by the man is given as 5m.
Work = force * distance
Work = 500N * 5m
Work = 2500Nm
Now, let's calculate the time taken by the man, which is given as 5 seconds.
Now we can substitute the values into the power formula.
Power = Work / Time
Power = 2500Nm / 5s
Power = 500W
Therefore, the power of the man is 500 watts.