The driver of a car going at 68milesh suddenly sees a, Ask an Expert

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The driver of a car going at 68miles/h suddenly sees a truckahead at 60 m moving slowly at 23 miles/h in the samedirection. By slamming on to the brakes, the driver of thecar achieves a maximum deceleration of 5m/s^2.

a. Will the driver of the car avoid a rear endcollision? If yes why?
b. If there is no collision, what is the distance of the closest approach in meters?

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