What is the use of a flywheel used in the machines, such . . .

Question : What is the use of a flywheel used in the machines, such as steam engine, automobile engine etc.

Doubt by manav

Solution : 

Machine such as steam engine, automobile engine etc. that produces rotational motion have a disc called a flywheel. Due to high moment of inertia, this wheel resist the sudden increase or decrease of the vehicle. It allows a gradual change in the speed of the vehicle hence it prevents jerky motion and provides a smooth ride.