This document discusses acceleration and how it relates to changing an object's motion. It defines acceleration as the rate at which velocity is changing, measured in m/s^2, and can refer to speeding up or slowing down. Acceleration can be determined from a velocity-time graph by calculating the slope, with a straight line indicating constant acceleration and a curved line indicating varying acceleration over time.

1. Acceleration

2. I. Changing an object’s motion Your trip to school each morning requires that you change motion. You do not travel in a straight line at a constant speed There are three ways to change an object’s motion Change speed Change direction Or both What parts of a car can change an object’s motion??

3. II. Changing velocity The rate at which the velocity is changing is called acceleration . Acceleration is basically how much you speed up or slow down in a given amount of time Acceleration is measured in m/s 2 Acceleration is not just for speeding up, but also for slowing down. This is often called deceleration or negative acceleration

4. III. Velocity-time graph Acceleration can be found from a v-t graph just like we found velocity from a d-t graph. By finding the slope of the line you can find the acceleration, or change in speed, of an object. If the v-t graph has a straight line, then the acceleration is constant. If the v-t graph has a curved line, then the acceleration is not constant.

5. IV. D-t AND v-t graphs See examples on the board.