A car is travelling on a road. The maximum velocity the car can attain is 24 ms-1 and the maximum deceleration is 4 ms-2. If car starts from rest and comes to rest after travelling 1032 m in the shortest time of 56 s, the maximum acceleration that the car can attain is
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a
6 ms-2
b
1.2 ms-2
c
12 ms-2
d
3.6 ms-2
answer is B.
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Detailed Solution
Area of v-t graph =displacement∴ 1032=1256+t0×24or t0=30 sDeceleration time t1=244=6 s∴ Acceleration time t2=56-t0-t1=20 s∴ Acceleration =2420=1.2 m/s2