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 figure below. When the car changes speed it does so uniformly. Select the appropriate choice for each statement.

The x-acceleration is ..... zero at 64 sec .

The speed at 10 sec is ..... the speed at 70 sec.

At 10 sec, the speed is as high as it gets.

The speed is ..... zero at 29 sec.

The x-acceleration is ..... zero at 15 sec.

The acceleration magnitude at 15 sec is ..... the acceleration magnitude at 36 sec.

greater than, equal to, less than, true, false

Explanation / Answer

The car travels 1100 m in 70 seconds. 1100m/70s = 15.7 m/s average. Rating appreciated!

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