Question
The distance x covered by a body moving in a straight line in time t is given by
The acceleration of the body will vary as




None of these
easy
Solution
None of these
Differentiating again, we have
.
is the acceleration. Using (i) in (ii) we have
Buy it is given that x^{2} = t^{2} + 2t + 3.
Using this in eq. (iii) we get a = 2/x^{3}.
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