The discussion centers on the relationship between torque and joules, specifically addressing the confusion surrounding their units. Torque is defined as the product of force and the perpendicular distance from the pivot point, typically measured in Newton-meters (N-m), while energy is measured in joules. Although both units can be equivalent mathematically, it is misleading to refer to torque in joules due to the differing definitions of displacement in each context. The conversation also touches on angular displacement and the calculation of work done by torque, emphasizing the need for a clear understanding of these concepts in physics.
PREREQUISITESPhysics students, educators, and anyone interested in understanding the principles of torque and energy in mechanics, particularly in the context of rotational motion.
I only studied torque in electromagnetism, what I know about is that when two equal forces opposite in direction and have different line of actions act on a coil, it's affected by a torque.A.T. said:There is only one force in the definition of torque. So what "two forces" are you taking about?
Haven't you studied this?ElmorshedyDr said:I only studied torque in electromagnetism, what I know about is that when two equal forces opposite in direction and have different line of actions act on a coil, it's affected by a torque.
No, I didn't study Torque in a mechanics class, it was a physics class and specifically in electromagnetism.adjacent said:Haven't you studied this?
You are thinking of a couple, where two forces are used to create a torque without producing a net force. See: http://en.wikipedia.org/wiki/Couple_(mechanics)ElmorshedyDr said:I only studied torque in electromagnetism, what I know about is that when two equal forces opposite in direction and have different line of actions act on a coil, it's affected by a torque.
ThanksDoc Al said:You are thinking of a couple, where two forces are used to create a torque without producing a net force. See: http://en.wikipedia.org/wiki/Couple_(mechanics)
Is the energy done by a couple is equal to zero ?Doc Al said:You are thinking of a couple, where two forces are used to create a torque without producing a net force. See: http://en.wikipedia.org/wiki/Couple_(mechanics)
Why should it be zero?ElmorshedyDr said:Is the energy done by a couple is equal to zero ?
I have no idea about rotational mechanics, linear only.adjacent said:Why should it be zero?
If the rod starts rotating,it gains rotational kinetic energy.
ElmorshedyDr said:I have no idea about rotational mechanics, linear only.