Question #34559

1 Answer
michael
Oct 9, 2016

-.56g or the car is decelerating at .56g.

Explanation:

Acceleration is equal to the slope of a velocity vs. time graph or (change in velocity/change in time)

If you are only looking for the acceleration from t=5 to t=9:
1. Change in velocity: 22m/s
2. Change in time: 4s
3. (Change in velocity)/(Change in time)=(5.5m)/s^2
4. (5.5m/s^2)/(9.80m/s^2)=.56g (negative)

If you are looking for the average acceleration between t=0 to t=9:
1. Change in velocity: 22m/s
2. Change in time: 9s
3. (Change in velocity)/(Change in time)=(2.44m)/s^2
4. (2.44m/s^2)/(9.80m/s^2)=.25g (negative)

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