Momentum is inertia in motion. The more weight there is in an object the more momentum it is going to have. To find weight the equation is mass times gravity. There is a rolling bowling ball in the picture I took. The bowling ball which is thirteen pounds would be much harder to stop than a golf ball. The bowling ball would also be harder to stop because there is less friction on it than there is on a golf ball. Therefore the golf ball will slow down faster due to friction. The safest way to stop momentum is by using more time. For example if you were to get punched in the face it would hurt less if you were to go with the punch instead of moving your head into the punch. Same thing here, the force would be much greater if you were to stop it all at once, instead of slowing it down gradually.
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