A car starting from rest is uniformly accelerated so that it's velocity in 5 seconds is 36 km/h . It travels at this velocity for 5 seconds, and then a brake is applied to bring it to rest in the next 5 seconds. Find the total distance travelled

Answer 1

36 km/hr = 10 m/s
so, the acceleration is

a = (10m/s) / (5s) = = 2 m/s^2
distance covered in 1st 5 seconds:
s = 1/2 at^2 = 25m

at 10 m/s, it travels another 10*5 = 50 m

the distance braking is the same as the first 25m, so the total distance is 100m

Answer 2

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