A car accelerates from rest at a constant rate a for some time after which it decelerates at a constant rate β β to come to rest. If the total time elapsed is t, the maximum velocity acquired by the car is given by
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
Using, v = u + at 1 , we get,
t 1 = 
( Q u = 0)
for retarded motion,
0 = v - β β /2 or t 2 = v/ β β
Total time t = t 1 + t 2 = 
= v 
or u = 
t
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