A girl of mass 50kg runs up a flight of stairs.After 10 minutes she is 250 metres above the ground. Determine her average power output. Ignore the effects of friction.

Power = work done / time

Work done
=mgh
=50*9.8*250
=122500 J
Time
=10*60 s
=600 s
Power
= work done /time
=122500/600 J/s
= 204.2 W

Ep=50*9.8*250

Ep = W
time=60*10
=600s
P= W/t
=122500/600
=204,166W •0�4

To determine the average power output of the girl, we need to use the formula:

Power = Work / Time

First, we need to find the work done by the girl. The work done against gravity is given by the formula:

Work = Force × Distance

The force acting against gravity can be calculated using the formula:

Force = Mass × Acceleration due to gravity

The acceleration due to gravity is approximately 9.8 m/s^2. Thus, the force acting against gravity will be:

Force = 50 kg × 9.8 m/s^2

Next, we can find the distance covered by the girl by subtracting the initial height from the final height:

Distance = Final height - Initial height
= 250 m - 0 m (assuming the ground level as the initial height)

Now we can calculate the work done by the girl:

Work = Force × Distance

Finally, we can determine the average power output:

Power = Work / Time