BASIC SCIENCE. A BOY OF MASS 50KG RUNS UP A FLIGHT OF 10 STAIRS EACH OF HEIGHT 0.2M IN 5 SECONDS CALCULATE HIS POWER.

Total height runned=10*0.2=2.work done=mgh=50*10*2.time taken=5sec.power =work/time=50*10*2/5=200joules.

force = mass * g

work = force * distance
power = work/time

I think your school subject is physics.

To calculate power, we need to use the formula:

Power = Work / Time

First, let's calculate the work done by the boy to climb the stairs. Work is given by the formula:

Work = Force * Distance

To find the force, we use Newton's second law of motion:

Force = Mass * Acceleration

Acceleration can be calculated using the formula:

Acceleration = (Final Velocity - Initial Velocity) / Time

In this case, the boy's initial velocity is 0 m/s since he starts from rest, and his final velocity can be calculated by dividing the total distance (height of each stair x number of stairs) by the time taken.

Height of each stair = 0.2 m
Number of stairs = 10
Total distance = Height of each stair x Number of stairs

We're given that the time taken is 5 seconds, so let's calculate the final velocity:

Total distance = 0.2 m x 10 stairs = 2 m
Final Velocity = Total distance / Time

Now, we can calculate the acceleration:

Acceleration = (Final Velocity - Initial Velocity) / Time
= (Final Velocity - 0 m/s) / 5 s

With acceleration calculated, we can find the force exerted by the boy using Newton's second law:

Force = Mass * Acceleration
= 50 kg * Acceleration

Finally, we can calculate the work done by multiplying the force and the distance:

Work = Force * Distance
= (50 kg * Acceleration) * 2 m

Now that we have the work done, we can calculate the power:

Power = Work / Time
= (50 kg * Acceleration * 2 m) / 5 s

By substituting the appropriate values for acceleration, we can calculate the power.

power=work /time.p=mgh=50*0.2*50/5=100

100% CORRECT