8. A motor car slows down from 72km/h to 36 km/h over a distance of 25 m. if the brakes are
applied with the same force, calculate
a. Distance travelled by the car
b. Total time in which the car comes to rest.
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Initial velocity of motor car, u = 72 km/h = 72 × 5/18 = 20 m/s. Final velocity of motor car, v = 36 km/h = 36 × 5/18 = 10 m/s. Distance covered by motor car is, s = 25 m
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