To accelerate an object, a force must be applied from outside the object. The amount of acceleration depends on both the applied force and the object's mass, with greater force resulting in more acceleration and greater mass resulting in less acceleration for the same force. Acceleration is calculated by taking the change in velocity over time.

1. Making Things Go Ms. Shinkle October 5-6, 2007

2. Acceleration To accelerate an object, a force must be applied. The force on the object must come from outside the object.

3. Acceleration If more force is applied, an object will be accelerated ____ If an object is more massive it will be accelerated ____ more less

4. Accelerated Motion Graph

5. Positive & Negative Acceleration

6. Effect of Mass on Acceleration F = ma

7. Acceleration Difference in velocity over time Acceleration = final velocity – initial velocity time a = (v f – v i )/ t

8. Momentum Property of a moving object due to its mass and velocity Momentum has a direction Momentum is ZERO if object is not moving Momentum = mass x velocity p = mv

9. How Much Momentum? A slow moving elephant Although it has a small velocity, it has a lot of mass Momentum = mass x velocity p = mv A bullet Although it has a small mass it has a very large velocity