A car travels a certain distance along a straight road (in the +x direction). Th

Question

A car travels a certain distance along a straight road (in the +x direction). The distance the car travels as a function of time is shown in the fiqure below. When the car changes speed it does so uniformly. Selet the appropriate choice for each statement. 1000 E 800 600 400 200 0 20 40 60 90 Time (s) Equal to The speed is zero at 26 sec. False At 10 sec, the speed is as high as it gets. Greater than The x-acceleration is zero at 58 sec. Greater than The speed at 10 sec is the speed at 79 sec. Greater than The acceleration magnitude at 15 sec is the acceleration magnitude at 37 sec. Less than The x-acceleration is zero at 10 sec By extrapolating the straight sections of the graph, you can estimate the time during which the speed is changing. This, with the change in speed, should let you estimate the magnitude of the acceleration Submit Answer Incorrect. Tries 6/12 Previous Tries

Explanation / Answer

1. The speed is equal because v is constant.

2. False because slope is maximum in between 40 to 60 sec.

3. X acceleration is equal because v is constant.

4. Speed is less because at 10 sec slope is less.

5. Less because at 15 sec curvature is less than curvature at 37 sec.

6. Equal because v is constant

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