Q.
The velocity of a body moving along x direction is related to its displacement as 3x2-2x. Acceleration of the body at x=2 m is
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a
48 ms-2
b
80 ms-2
c
18 ms-2
d
10 ms-2
answer is B.
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Detailed Solution
v=3x2-2xa=dvdt=dvdxdxdt=6x-2v=23x-13x2-2xputting x=2m a=26-112-4=80 m/s2
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