Physics, asked by anupuramanirudh103, 1 month ago

6.
A car accelerates from rest with a uniform acceleration 2 ms-2 for some time.
Then brakes are applied to come to rest with a deceleration of 4 ms. If the
total time of travel is 15s, its maximum velocity in kmph is
b) 56
c) 60
d) 50
a) 72
Pl say the answer

Answers

Answered by samsungchek486
0

Answer:

Let v,t1,t2 be the maximum velocity attained, time for which car accelerated and the time for which car retarded respectively

⇒t1=(v−u)/a=(v−0)/2=v/2

⇒t2=(v−u)/a=(0−v)/(−4)=v/4

Now it is given that, 

⇒t1+t2=3

⇒v/2+v/4=3

⇒v=4m/s

Hence correct answer is option C

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