Asked by Claire
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
Answers
Answered by
Steve
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
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
Answered by
Chimsimdi
It is amazing and very helpful and very informative and very complex and I do not understand
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