flywheel, not exactly the best example, but would do.
in plain english, i think the best way to describe it is that
with a lighter rotating mass, accelrating is more "direct", faster, jerkier?
but with a heavier rotating mass, the gears/stuff acts as a buffer, and makes the accelration smoother.
oh and i dont own a car, how sad. but i'm happy with my r/c car nevertheless
