A 1050 kg car is traveling at a speed of 25 m/s when the driver sees that there is a tree across the road.If the car has a constant deceleration of -5.0 m/s² and the driver has a reaction time of 0.30 s,how far does the car travel before it comes to a stop? A)7.5 m B)8.0 m C)63 m D)70 m

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Quizplus · Accepted Answer

The car travels 7.5 m during the driver's reaction time (0.30 s * 25 m/s). Then, using the formula $v^2 = u^2 + 2as$ for deceleration, where $v = 0$, $u = 25$ m/s, and $a = -5$ m/s², the stopping distance is 62.5 m. Total distance = 7.5 m + 62.5 m = 70 m.

A 1050 Kg Car Is Traveling at a Speed of 25