a rule states that the frictional force between dry concrete and a sliding car's tyre rule is equal to nine -tenth of the car's weight.if the skid marks left by a car in coming to rest are 20 m long .how fast was the car going before the breaks were applied
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Answer:
18 metre per second is the speed of the car acquired after acceleration
Explanation:
(9÷10)×20
0 is reduced so
9×2
18m/s
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