A man of mass 50kg ascend a fight of stairs 5m high in 55 seconds.if acceleration due to gravity is 10ms the power expand is what
work = force * distance
power = work/time = (50*10 N)/(55s) = 50/55 W
To find the power expended by the man while ascending the flight of stairs, we can use the formula:
Power = Work / Time
First, let's calculate the work done by the man to ascend the flight of stairs. Work is equal to the force applied multiplied by the distance traveled. The force applied is equal to the gravitational force, which can be calculated as the product of the man's mass and the acceleration due to gravity (g = 10 m/s^2).
Force = mass * acceleration due to gravity
Force = 50 kg * 10 m/s^2
Force = 500 N
Work = Force * Distance
Work = 500 N * 5 m
Work = 2500 Joules
Next, let's use the given time to find the power.
Power = Work / Time
Power = 2500 J / 55 s
Power ≈ 45.45 Watts
Therefore, the power expended by the man while ascending the flight of stairs is approximately 45.45 Watts.