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 chanaes speed it does so uniformly. Select the apbropriate choice for each statement. 1000 800 60 400 200 20 40 60 80 Time (s) Grester than The speed at 10 sec is the speed at 70 sec. LEquato--O The speed is zero at 23 sec. sito-?) The x-acceleration is zero at 52 sec Less than The acceleration magnitude at 15 sec is. the acceleration magnitude at 36 sec. Lessman 4) The x-acceleration is zero at 15 sec. At 48 sec, the speed is as high as it gets rue 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

Explanation / Answer

Knowledge used: slope represents velocity .

1] greater than

2] equal to

3] equal to

4] more than [ Because change of slope is more gradual at 36 s than at 15s. This one is difficult part, it can be "less than" as proper curvature magnitude/scale is not given]

5] less than

6] True

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