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Q.

The displacement of a particle in time 't' is given byS=t3−t2−8t−18 The acceleration of the particle when its velocity vanishes is

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a

5 units/sec 2

b

15 units/sec 2

c

10 units/sec 2

d

20 units/sec 2

answer is B.

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Detailed Solution

V=0⇒t=2 or −43, a=6t−2; at t=2⇒a=10

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