Energy is measured in joules, which is kgm^2/s^2, or Nm. It is a scalar quantity, which means that it only has "muchness." Work is Force * Displacement; it is different from power, which is the rate at which you do work. The equation for power is Work / Time. Therefore Time is irrelevant to Work, but very much relevant to Power. Do not mistake the two.
IfI raced my friend who weighs the same as me to Nijo Temple in the back of the photo, and she finished 2 seconds before I did, we would have done the same amount of work. However, because she finished before me, she'd be using more power than me.
Here are some equations we've learned for work...
Potential Energy (s) = 1/2kd^2
Potential Energy (g) = mgh
Kinetic Energy = 1/2mv^2
It seems relatively easy so far...But when you toss in drawings of springs, ramps, friction, and wind tunnels, everything starts to get a bit more confusing.
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