Understanding the Concepts
* Power: The rate at which work is done. It's measured in watts (W).
* Work: The force applied over a distance. It's measured in joules (J).
* Force: A push or pull that can change the motion of an object. Measured in newtons (N).
* Distance: The length of the path traveled by an object. Measured in meters (m).
* Time: The duration of an event. Measured in seconds (s).
Formula
Power (P) = Work (W) / Time (t)
And since Work (W) = Force (F) x Distance (d)
We can combine these equations to get:
Power (P) = (Force (F) x Distance (d)) / Time (t)
Calculation
* Force (F) = 1 N
* Distance (d) = 2 m
* Time (t) = 1 s
Power (P) = (1 N x 2 m) / 1 s = 2 W
Answer: You expend 2 watts of power.