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# Speed, Velocity And Acceleration

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A lesson ppt on speed, velocity and acceleration for high school students.

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### Speed, Velocity And Acceleration

1. 1. Topic 2: Kinematics
2. 2. 2.1 Speed, Velocity and Acceleration <ul><li>Speed is the distance traveled divided by time. </li></ul><ul><li>Speed = distance traveled/time taken </li></ul><ul><li>The SI unit of speed is metre per second (m s -1 ) </li></ul>
3. 3. 2.1 Speed, Velocity and Acceleration <ul><li>Velocity is the distance traveled in a given direction (or displacement) divided by the time taken. </li></ul><ul><li>Velocity = displacement/time taken </li></ul><ul><li>The SI unit of speed is metre per second (m s -1 ) </li></ul>
4. 4. 2.1 Speed, Velocity and Acceleration <ul><li>Two objects travelling with the same speed but in different directions have different velocities. </li></ul><ul><li>Since velocity has both magnitude and direction. it is a vector quantity. </li></ul>
5. 5. 2.1 Speed, Velocity and Acceleration <ul><li>Acceleration is the rate of change of velocity. </li></ul><ul><li>Acceleration </li></ul><ul><li>= change in velocity/time taken </li></ul><ul><li>= (final velocity - initial velocity)/time taken </li></ul><ul><li>The acceleration is uniform if the rate of change of velocity is constant. </li></ul>
6. 6. 2.1 Speed, Velocity and Acceleration <ul><li>In linear motion, a body traveled in a straight line. The direction of motion does not change. Any change in the velocity is due to the change in speed. </li></ul><ul><li>Hence the acceleration is </li></ul><ul><li>acceleration = Change in speed/time taken </li></ul>
7. 7. 2.1 Speed, Velocity and Acceleration
8. 8. 2.1 Speed, Velocity and Acceleration <ul><li>When the velocity decreases, the acceleration is negative and the acceleration is known as deceleration or retardation. </li></ul>
9. 9. 2.1 Speed, Velocity and Acceleration
10. 10. 2.1 Speed, Velocity and Acceleration <ul><li>Non-uniform acceleration — the rate of change of velocity is not constant, instead it changes with time </li></ul>
11. 11. 2.1 Speed, Velocity and Acceleration
12. 12. 2.1 Speed, Velocity and Acceleration
13. 13. 2.1 Speed, Velocity and Acceleration
14. 14. 2.1 Speed, Velocity and Acceleration
15. 15. Practice Questions
16. 16. Practice Questions