torque

I have a unique problem that I cannot find an answer to. In the diagram, Ex. A shows a simple balance, with the weights on both sides attached to the cross beam with string. To simplify the problem, both strings are attached equidistant to the pivot point, lets say at 40 centimeters. When...

Almost everyone knows about the magnetic field created around a wire by the flow of charges in it. There is an simpe experiment that shows the change of direction of a compass when it is close to an wire with current in it. With that in mind, see this problem. There is an infinite wire, with a...

I can understand power. The ability of an engine to push a car. I find the distinction with torque a little hard to understand. I did physics at High School, and could plug in the values to the equations. I just don't understand it instinctively. Why is twisting power in an engine so...