Unit+2+Acceleration

=Acceleration:= 1. Increase in the rate or speed of something. 2. The rate of change of velocity per unit of time

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The decreasing of speed is called **negative acceleration** or **deceleration**. Deceleration can be when you are running really fast in a race and when you reach the finish line you slow down and stop. A change in direction can also be acceleration. When a ball is hit it is accelerating because it changes its direction as it is hit.
 * What is Acceleration? ** Acceleration is the **rate at which velocity changes**. It refers to **increasing but also decreasing speed or a change in direction**. Increasing speed is acceleration. An example of acceleration is when a car speeds up and passes another car.

Calculating Acceleration To determine the acceleration of an object moving in a straight line, you have to calculate the change in speed per unit of time. Acceleration= Final Speed-Initial Speed/Time. The SI unit for acceleration is meters per second. Example: an airplane starts on the runway at 0m/s. Its final speed is 40m/s in a time of 5s. So the acceleration is 8m/s^2…. A=40m/s-0m/s/5s= 8m/s^2.

Graphing Acceleration You can use a speed versus time graph or a distance versus time graph to analyze the motion of an accelerating object. A slanted, straight line on a speed versus time graph means that the object is accelerating at a constant rate.

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=Example Acceleration Problem= =media type="custom" key="19185828"= =Games and Practice= =[|Acceleration Battleship]= =[|Rags to Riches speed, velocity, and acceleration]= =[|Who wants to be a Millionaire]= =[|Understanding Acceleration]=