I'm having trouble understanding work. Taking an example: If I have a 1kg object and I apply a force of 1N for 1sec, It will move 1/2m and thusI will have done 1/2 (units?) of work, by the equation W=Fs. But instead, if I consider the same object now travelling at 10m/s and apply a 1N force for 1 sec, the object will travel 10.5m in that time, so now the work done is 10.5? I don't understand how you can do more work when all you've done is apply the same force to the same object for the same amount of time, but the only difference is that the object in the first case was stationary relative to you, while the other case it was moving. And also, if I applied the force in the direction opposing the motion, less work would have been done than if I applied it in the direction of motion?