- #1
Qube
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Homework Statement
The coordinate of an object is given as a function of time by x = 7t - 3t^2, where x is in meters and t is in seconds. Its average velocity over the interval from t = 0 to t = 2 s is?
(1) -5 m/s (2) 5 m/s (3) 11 m/s (4) -11 m/s (5) -14.5 m/s
Homework Equations
Average velocity = change in position / change in time.
The Attempt at a Solution
Change in time = 2 seconds.
Change in position:
x(0) = 0.
x(2) = 14 - 12 = 2.
Change in position is 2.
Therefore avg. velocity is 2/2 or 1m/s.
Am I doing something wrong?