Define torque. What is its unit? On what factors does torque (moment of a force) depends?
Difficulty: Easy
Torque (moment of a force):
The turning effect of a force is called torque or moment of the force.
$Torque \: \tau= F\times L$
Torque is a vector quantity and its direction can be found by using the right-hand rule.
Unit of torque:
The unit of torque is Nm.
Torque depends upon two factors
The torque or moment of a force depends upon the force F and the moment arm L of the force.
1. Magnitude of the force(F)
Greater is a force, greater is the moment of the force.
Τ $\propto$ F ………………………………………. (i)
2. Moment arm
Similarly, the longer is the moment arm, the greater is the moment of the force.
Τ $\propto$ L ………………………………………. (ii)
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