42.A particle moves in a straight line and it's position x at time t is given by x^2=2+t .it's acceleration is given by (1) 2/x^3. (2) 1/4x^3. (3) 1/4x^2. (4)1/x^2
the displacement of a body is given by s=1/2(gt^2) , where g is acceleration due to gravity. The velocity of the body at any time t is Options: a) gt^3/6 b) gt^2/2