Question

if the resultant external torque acting on the system is zero then:​

Answer 1

Answer:

Angular momentum is conserved if the net torque acting on an object is zero. So angular momentum is constant in this case. The torque acting on a body is the rate of change of angular momentum. If the net torque acting on a body is zero, then the rate of change of angular momentum of the body is also zero.

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Answer 2

If the torque on system is zero then angular momentum of the body is constant or conserved

Explanation:

• Torque is the quantity in rotational motion which is similar as of force in linear motion. Torque produces the rotation in the system it is also defined as moment of force
• Torque is defined as rate of change of angular momentum it is given as

                                  $Torque = \frac{change in angular momentum}{time taken}$

                                   ζ = $\frac{dL}{dt}$

• From above equation if torque is zero then rate of change of angular momentum is zero that is whenever differentiation of any quantity is zero then that quantity is constant or not changing with time hence angular momentum is constant or conserved that is final momenta is same as of initial momenta and body does not experience any rotation
• In linear motion torque is similar as of force applied on any body to change its position and is equal to rate of change of linear momentum

To know more about torque, visit:

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