Momentum

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# Momentum - PowerPoint PPT Presentation

Momentum. Momentum. Measure of Mass in Motion All Objects Have Mass If an Object is Moving, then it is a Mass in Motion 2 Variables How Much Stuff (Mass) is Moving How Fast (Velocity) the Stuff is Moving.

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## PowerPoint Slideshow about ' Momentum' - casta

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Presentation Transcript

### Momentum

Momentum
• Measure of Mass in Motion
• All Objects Have Mass
• If an Object is Moving, then it is a Mass in Motion
• 2 Variables
• How Much Stuff (Mass) is Moving
• How Fast (Velocity) the Stuff is Moving

Think of a ball bouncing off a wall. It leaves the wall at the same speed as before. Let’s call going from right to left negative, and going from left to rightpositive.

The diagram shows two cars at a fairground, before and after bumping into each other. One car and driver has a total mass of 500 kg, while the other car and driver has a total mass of 400 kg.

Momentum, Continued
• P=MV
• Mass: kg
• Velocity: m/s
• Units: kg∙m/s
• Determine the momentum of a ...
• a. 60-kg halfback moving eastward at 9 m/s.
• b. 1000-kg car moving northward at 20 m/s.
• c. 40-kg freshman moving southward at 2 m/s.
• A car possesses 20,000 units of momentum (kg∙m/s) What would be the car\'s new momentum if ...
• a. its velocity were doubled.
• b. its velocity were tripled.
• c. its mass were doubled (by adding more passengers and a greater load)
• d. both its velocity were doubled and its mass were doubled.
Law of Conservation of Momentum
• When two particles (or other things) collide, both of them have a momentum. What happens to their momenta when they collide?