1.

If a particle starts moving along a straight ine withinitial velocity u under contact acceleration a, its displacement with time is given by the relation `x=ut+(1)/(2)at^2` Q. Differentiation of `x` w.r.t. `t` will beA. `y=(at)/(2)`B. `u+at`C. `u+2at`D. `(ut^2)/(2)+(at^3)/(6)`

Answer» Correct Answer - B
`x=ut+(1)/(2)at^2`
`dx=u(1)+(1)/(2)a(2t)=u+at`


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