A car accelerates from rest at a constant rate of 2 m s -2 for some time. Then, it retards at a constant rate of 4 m s~ 2 and comes to rest. If the total time for which it remains in motion is 3 s, Then the total distance travelled is
Text Solution
Verified by ExpertsThe correct answer is:
D
Using v = u + at or v - u = at, we find that if 
is doubled, t will be halved.
If t is the time for accelerations, then 
is the time for retardation.
Now, t + 
= 3
or 
t = 2s
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