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An object's (one dimensional) motion is represented by the following equation of position
6)
versus time:
x = 8+9t – 3t2
a) Write down an equation for velocity as an explicit function of time.
b) What is the average velocity from t = 0 s to t= 4 s
c) What is the average speed from t= 0 s to t= 4 s
d) What is the average speed from t=3 s to t= 4 s

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