Question:
If torque is zero then:
If torque is zero then:
Updated On: Jun 20, 2022
- angular momentum is conserved
- linear momentum is conserved
- energy is conserved
- angular momentum is not conserved
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The Correct Option is A
Solution and Explanation
Torque is the rate of change of angular momentum. That is, $\tau=\frac{d L}{d t}$
If torque $(\tau)$ is zero, then $\frac{d L}{d t}=0$
or $L =$ constant
i.e., angular momentum of the system is conserved.
If torque $(\tau)$ is zero, then $\frac{d L}{d t}=0$
or $L =$ constant
i.e., angular momentum of the system is conserved.
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Concepts Used:
System of Particles and Rotational Motion
- The system of particles refers to the extended body which is considered a rigid body most of the time for simple or easy understanding. A rigid body is a body with a perfectly definite and unchangeable shape.
- The distance between the pair of particles in such a body does not replace or alter. Rotational motion can be described as the motion of a rigid body originates in such a manner that all of its particles move in a circle about an axis with a common angular velocity.
- The few common examples of rotational motion are the motion of the blade of a windmill and periodic motion.