relation between torque and power
Answers
work (or energy) is force multiplied by distance - the distance of displacement over which the force is applied. So if I push my car with a force of 10 newtons, and I manage to push the car 1 meter before I give up, then the work I have done (or energy I have expended) is 10N x 1m = 10Nm. Power is how quickly I can do work. So if I push my car with 10N force and move it 1m and it takes me 1 hour to do it, then my power, or rate of doing work, is 10Nm/hr.
Torque is just a twisting force. And rpm is both distance and time wrapped together. 1 rotation is the distance part, and how long it takes to complete 1 rotation is the time part. Rotations per minute, right? So, torque multiplied by rpm is the same as a force applied over a distance for a period of time, just like me pushing my car.