Chapter 4, Section 3 Acceleration.

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Presentation transcript:

Chapter 4, Section 3 Acceleration

Acceleration acceleration: the rate at which your speed (or velocity) changes

Acceleration + a = increasing speed - a = decreasing speed

Acceleration and Speed Speed and acceleration are not the same thing! You can be moving at a constant speed, but have no acceleration

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Acceleration and Speed-Time Graphs

Acceleration and Speed-Time Graphs 1. Determine the slope of the line between 0 s and 4 s. What does the slope of the line tell you about the acceleration of the car during this time interval? 2. Describe the speed of the car between 5 and 7 s. What does this tell you about the car’s acceleration? 3. What is the slope of the line between 7 and 9 s? What does this tell you about the car’s acceleration?

Acceleration and Graphs of Motion The position-time graph is curved when an object accelerates