Bell Ringer 29 June 2009. LT: Describe how acceleration over a period of time affects the velocity...
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Transcript of Bell Ringer 29 June 2009. LT: Describe how acceleration over a period of time affects the velocity...
Bell Ringer
29 June 2009
• LT: Describe how acceleration over a period of time affects the velocity of an object.
• Discuss with your team which forces applied to a race car are responsible for its constantly changing state of motion around a circular track.
Terms associated with motion
• Position• Time• Distance• Speed• Velocity• Acceleration• Force• Mass
Definitions
• Position = location at a given time• Distance = change in position (e.g., 2 m)• Speed = (change in position)/time (4 m/s)• Velocity = speed & direction (+3m/s, -5m/s)• Acceleration = (change of velocity)/time
– change in speed implies acceleration– change in direction implies acceleration
Putting it all together
• Acceleration ramp (acceleration, time1)
• Constant velocity plane (distance, time2)• What is relationship between the acceleration
and time1 on ramp and the velocity on the horizontal plane?