What work can an electric saw, whose motor has a power of 1 kW, do in 15 minutes?

Given:

t = 15 minutes – time interval;

W = 1 kW = 1000 watts – the power of the electric saw motor.

It is required to determine A (Joule) – what kind of work the electric saw motor does in the time interval t.

Let’s convert the units of measurement of time to the SI system:

t = 15 * 60 = 900 seconds.

Then, to determine the work, you need to use the following formula:

W = A / t, from here we find that:

A = W * t = 1000 * 900 = 900000 Joules (900 kJ).

Answer: in 15 minutes, the electric saw motor does work equal to 900,000 Joules (900 kJ).