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Acceleration unit 6.2 year 10. Introduction An often confused quantity, acceleration has a meaning much different than the meaning associated with it.

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Presentation on theme: "Acceleration unit 6.2 year 10. Introduction An often confused quantity, acceleration has a meaning much different than the meaning associated with it."— Presentation transcript:

1 Acceleration unit 6.2 year 10

2 Introduction An often confused quantity, acceleration has a meaning much different than the meaning associated with it by sports announcers and other individuals.

3 Acceleration Acceleration is a vector quantity that is defined as the rate at which an object changes its velocity An object is accelerating if it is changing its velocity.

4 Acceleration Teacher demonstration As an object fall it accelerates due to the force of gravity.

5 Constant acceleration Sometimes an accelerating object will change its velocity by the same amount each second. This is referred to as a constant acceleration since the velocity is changing by a constant amount each second.

6 Calculating the Average Acceleration [ v av ] The average acceleration (a) of any object over a given interval of time (t) can be calculated using the equations

7 Symbols Δ is the letter Delta from the Greek alphabet. It means a change in. Example: Δt = a change in time

8 Units Acceleration values are expressed in units of velocity/time. Typical acceleration units include the following: m/s/s km/hr/s ms -2 m/s 2

9 Acceleration and graphs High acceleration is a rapid increase in speed. The speed–time graph would be a steeper one than if you accelerated at a lesser rate; that is, the slope or gradient of a speed–time graph gives us the rate of acceleration.

10 Animation Direction of Acceleration and Velocity Direction of Acceleration and Velocity


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