How to determine clockwise and anti clockwise moment? What is Torque? What is moment? Physics

This lecture is about how to determine clockwise and anti clockwise moment

Q: What is torque?
Ans: The turning effects produced by force an in object about a fixed point is called Torque or moment of force or just moment.
For example, when you push on the handle of a door, you exert force on the handle of a door. As a result, turning effects produced in the door about fixed point.
In Physics, here you don't exert force on the handle of the door rather you exert torque or moment on the handle of the door.
Similarly, when you want to open a tightly closed nut, you use a wrench in order to open the closed nut. You hold the handle of the wrench and exert force on the wrench; as a result, your force produces turning effects both in the wrench and in the nut. This turning effects produced in the nut by the force is known as moment or torque.

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