The fireman can carry a lady stuck in a building down a 20m ladder in 20 seconds. He uses 160N of force. How much power was used?

1 answer

Power is defined as the rate at which work is done or the rate at which energy is transferred. In this context, power can be calculated using the equation:

Power = Work / Time

We can calculate the work done by the fireman using the equation:

Work = Force × Distance

Given that the force used by the fireman is 160N and the distance covered is 20m, we have:

Work = 160N × 20m = 3200 Joules

Now, we can calculate the power using the equation mentioned earlier:

Power = Work / Time = 3200J / 20s = 160 Watts

Therefore, the power used by the fireman is 160 Watts.