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Q.

The displacement of a particle is given by y=a + bt + ct2- dt4. The initial velocity and acceleration are respectively .

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a

b,2c

b

b,-4d

c

-b,-2c

d

2c,-4d

answer is C.

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Detailed Solution

y=a+bt+ct2-dt4 ∴v=dydt=b+2ct-4dt3 and a=dvdt=2c-12dt2

Hence, at t = 0, vinitial = b and ainitial = 2c.

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