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BodhiAI
Oct. 31, 2019

Torque:

Torque:

If the particle rotating in xy plane about the origin under the effect of force and at any instant the position vector of the particle is , then

Torque

τ = rF sin φ

[whereφis the angle between the direction of and ]

(1) Maximum and minimum torque:

As or τ = rF sin φ

rmax. = rF

When |sin φ| = max. = 1

i.e.  φ= 90°

is perpendicular to

rmax. = 0

When |sin φ| = min. = 0

i.e.  φ= 0° or 180°

is collinear to

(2) If a body is acted upon by more than one force, the total torque is the vector sum of torques due to each force. 

(3) A body is said to be in rotational equilibrium if resultant torque acting on it is zero i.e.

(4) Rotatory Motion :

Torque

Work

Power

Torque