Momentum & Review:

Objectives:

1.    Define momentum.

2.    Calculate momentum.

3.    Explain the law of conservation of momentum.

Web Resources:

Notes:

Inertia is the property of mass that resists change. Therefore, it is safe to say that as the mass of an object increases so does its inertia.  Weight is the measurement of resting inertia and momentum is the measure of inertia at a certain velocity.  We all know that at the same forward velocity it would be harder to stop a rolling car that a rolling bike.  Common sense tells us that the mass of the car makes it more difficult to stop.  Here are some simple rules for momentum..

• Momentum can be calculated by multiplying the mass of an object by its forward velocity. (mv = kg*m/s)
• Mass and velocity are both directly proportional to the momentum.
•         If you increase either mass or velocity, the momentum of the object increases proportionally.
•         If you double the mass or velocity you double the momentum.
•         If you halve the mass or velocity you halve the momentum