Friction torque

Have you ever tried pushing a heavy object and found it difficult to move? This is because there is something called "friction" that prevents things from moving smoothly. Friction is a force that happens when two surfaces rub against each other. It is kind of like when you rub your hands together and feel them get warm.

Now, have you ever twisted a doorknob or a jar lid that was really tight? You had to use some extra force to turn it, right? Well, when you twist something, like a knob or a lid, you are creating something called "torque". Torque is a force that causes an object to rotate or twist.

So, when you combine friction and torque, you get "friction torque". Friction torque is the force that stops an object from rotating or twisting smoothly. It is the amount of force that is needed to overcome the resistance caused by friction. Imagine trying to twist a jar lid that is really tight – you have to use a lot of force to overcome the friction torque.

In summary, friction torque is the resistance caused by friction when an object is rotating or twisting. It makes it harder for things to move smoothly, and requires extra force to overcome.