# law of conservation of momentum

## conserving momentum

When skater 2 runs into skater 1, hes going faster than skater 1 so he has more momentum. Momentum is a property of a moving object that makes it hard to stop. Its a product of the objects mass and velocity. At the moment of the collision, skater 2 transfers some of his momentum to skater 1, who shoots forward when skater 2 runs into him. Whenever an action and reaction such as this occur, momentum is transferred from one object to the other. However, the combined momentum of the objects remains the same. In other words, momentum is conserved. This is the law of conservation of momentum. Click image to the left or use the URL below. URL: Click image to the left or use the URL below. URL:

## modeling momentum

The Figure 1.1 shows how momentum is conserved in the two colliding skaters. The total momentum is the same after the collision as it was before. However, after the collision, skater 1 has more momentum and skater 2 has less momentum than before. Q: What if two skaters have a head-on collision? Do you think momentum is conserved then? A: As in all actions and reactions, momentum is also conserved in a head-on collision.

## instructional diagrams

No diagram descriptions associated with this lesson

## questions

whenever an action and reaction occur, momentum is

``````a) created.

b) destroyed.

-->  c) transferred.

d) none of the above
``````

when momentum is transferred from one object to another, their combined momentum remains the same.

``````-->  a. true

b. false
``````

## diagram questions

No diagram questions associated with this lesson