When you start the engine of your car with the transmission in neutral, you notice that the car rocks in the opposite sense of the engine’s rotation. Explain in terms of conservation of angular momentum. Is the angular momentum of the car conserved for long (for more than a few seconds)?

Solution 13CQ:

Step 1 of 3:-

Angular momentum is a fundamental properties of objects which is denoted by the symbol $$\vec{L}$$.

This is defined as,

$$\vec{L}=\vec{r} \times \vec{P}$$.

The rate of change of this quantity is called the torque.

When there is no external torque on the system, the angular momentum of the system is conserved.