in traveling a distance 3 km between points A and D, a car is driven at 100 km/h

Question

in traveling a distance 3 km between points A and D, a car is driven at 100 km/h from A to B for t seconds and 60 km/h from C to D also for t seconds. if the brakes are applied for 4 seconds between B and C to give the car a uniform deceleration, calculate t and the distance s between A and B in traveling a distance 3 km between points A and D, a car is driven at 100 km/h from A to B for t seconds and 60 km/h from C to D also for t seconds. if the brakes are applied for 4 seconds between B and C to give the car a uniform deceleration, calculate t and the distance s between A and B

Explanation / Answer

a distance between points A and D=3km using speed 100km/hr, a car travel A to B for t seconds, 60 km/h from C to D also for t seconds. after brakes applied......... All distances stated in km. Distance timeline is.......3 = 100 x t/3600 + 80 x 4/3600 + 60 x t /3600...........hence t = 65.5 sec. Distance A to B = (65.5 /3600) x 100 = 1.82km....B to C = 0.089 km.....C to D = 1.09..

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