It was once recorded that a car left skid marks which were 300m in lenght. Assuming that the car skidded to a stop with a constant acceleration of -4ms, the speed of the car before it began to skid is
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Explanation:
Using the formula: d = ½at² + v0t
---> 290 = ½(-3.90)(12)² + v0(12)
---> 290 = -280.8 + 12v0
---> 570.8 = 12v0
---> 47.6 m/s
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