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Linear Acceleration

Linear Acceleration. By Geoff Cuevas and Sahan Luvis Hennedige Fernando. Introduction.

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Linear Acceleration

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  1. Linear Acceleration By Geoff Cuevas and Sahan LuvisHennedige Fernando

  2. Introduction • Acceleration is the rate of change in velocity over a period of time. Acceleration is caused by a change in either speed or direction. However unlike with speed, this doesn’t mean a person with 0 acceleration isn’t moving, it means they are moving at a constant rate without speeding up or slowing down. • Acceleration can reflect a change in magnitude of velocity without a change in direction or a change in the direction of velocity. In other words, a change in speed or direction.

  3. Three Phases • There are three phases in acceleration: • The propulsive phase where velocity increases without a change in direction causing acceleration • The breaking phase where velocity decreases during a change in direction or a decrease in speed causing deceleration • The static phase where velocity stays constant and acceleration is 0

  4. Calculating Acceleration • Acceleration (A) is equal to a change in velocity (v) over time (t). • A(m/) = ∆v/t • ∆v = final velocity – initial velocity • For example, a cyclist rides 15 meters over a period of 2 seconds. • A = 15/2 • = 7.5m/ • Acceleration can also be calculated using force (in Newtons, N) and mass (in kilograms) • A = F/M

  5. Acceleration- Usain Bolt • http://www.youtube.com/watch?v=Y2kOoniBI7c

  6. Quiz time I love quizzes.

  7. Acceleration is the rate of change in______ over ______ Distance over speed Velocity over time Speed over time This isn’t even a question

  8. Acceleration can reflect a change in Magnitude of velocity Direction of velocity A and B Acceleration can’t reflect anything because it’s not a mirror or whatevs

  9. One of the three phases of acceleration includes The Velocity Phase The Static Phase The Displacement Phase The Emo Phase

  10. Quiz Answers • B- Velocity over time • A- Magnitude • B- Static Phase

  11. Bibliography • http://btc.montana.edu/olympics/physbio/glossary/g12.html • https://biomechanics.kookmin.ac.kr/kmu20112/Lecture_05.pdf • http://www.youtube.com/watch?v=MAS6mBRZZXA • http://www.topendsports.com

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