- The difference between average speed and instantaneous speed is that average speed is a measure of the distance traveled in a given period of time. While instantaneous speed is the your speed at a particular instant. Speedometer represents instantaneous speed.
- Constant speed is a speed at which the object covers the same distance every regular interval of time. The object will move 300m. (30*10)
- Acceleration: the rate at which an object changes its velocity. Acceleration = change in velocity/time. (m/s/s or mi/hr/s or km/h/s). The car is going 28 m/s after 4 seconds.
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| Positive velocity, 0 acceleration |
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| Positive velocity, positive acceleration |
- The slope and velocity are the same thing. If the slope increases, so will the velocity.
- Pick two points on the line. Then determine the difference in y-coordinates (rise). Then determine the difference in x-coordinates (run). Divide the difference of y-coordinates by the x-coordinates (rise/run).
- The slope of a velocity-time graph represents acceleration. If the acceleration is 0 , then the slope is a horizontal line. If the acceleration is positive, the slop is an upward sloping line. If the acceleration is negative, the slope is a downward sloping line.
- Free fall means an object is falling under the sole influence of gravity. The acceleration of an object at free fall is 9.8 m/s/s.
- The object is accelerating at a constant speed. Acceleration= (11.57-3.77/3.1-.99)= 3.7m/s/s
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