A girlwhose mass is40kg wolks up a flight of 20steps each 150mm height in 10seconds calculate the average power dp byag

power = work / time

work = m g h = 40 kg * g * (20 * .15 m)

a girl whose mass is 40kg walk up a flight of 20 steps 150mm hieght in10second.find the average power developed (g=10mls)

To calculate the average power, we need to know the work done and the time taken.

First, let's calculate the work done by the girl:

Work (W) = Force x Distance

The force exerted by the girl is equal to her weight, which can be calculated using the formula:

Weight (W) = mass x gravitational acceleration

Using the given mass of the girl (40 kg) and assuming a standard gravitational acceleration of approximately 9.8 m/s^2, we can calculate the weight:

Weight = 40 kg x 9.8 m/s^2

Next, we need to calculate the distance the girl walks up the flight of steps. Each step has a height of 150 mm, which is equivalent to 0.15 meters. The total distance can be calculated by multiplying the step height by the number of steps:

Distance = 0.15 m x 20 steps

Now, we have the weight (W) and the distance (D). The work done (W) can be calculated by multiplying the weight by the distance:

Work = Weight x Distance

We can substitute the already calculated weight and distance values:

Work = (40 kg x 9.8 m/s^2) x (0.15 m x 20 steps)

Finally, we need to calculate the time taken in seconds, which is given as 10 seconds.

Now that we have both the work done and the time taken, we can calculate the average power using the formula:

Average Power = Work / Time

Replace "Work" with the previously calculated work and "Time" with the given time of 10 seconds:

Average Power = (work) / 10 seconds

By substituting the values, we can calculate the average power exerted by the girl.