The power used by the chainsaw is approximately 22.22 watts (W).
To calculate the power used by the chainsaw, we need to use the formula:
Power = Energy / Time
In this case, the energy used by the chainsaw is given as 4000 J (joules), and the time is given as 180 s (seconds).
Plugging these values into the formula, we get:
Power = 4000 J / 180 s
To simplify this calculation, we can divide 4000 by 180:
Power = 22.22 J/s
Therefore, the power used by the chainsaw is approximately 22.22 watts (W).
It's important to note that watts (W) are the standard unit of power in the International System of Units (SI). Power measures how quickly energy is being used or transferred. In this case, the chainsaw is using energy at a rate of 22.22 joules per second.