An object's (one dimensional) motion is represented by the following equation of position 6) versus time: x = 8+9t – 3t? 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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