Question

A particle moves along a straight line such that its displacement x with time varies with time t as x=a+bt+ct^2
Where a b c are constant. Then its avg vel during third second is.........

Answer 1

find instanteneous velocity by differentiating x, we get,

v=b+2ct. find v by putting t=0,1,2,3

we want to cal. avg velocity during 3rd sec. so take avg. of all four values. u will get ur ans.