Question:

A particle is moving along the x-axis with its co-ordinate with time t given by x(t) = 10 + 8t – 3t² Another particle is moving along the y-axis with its co-ordinate as a function of time given by y(t) = 5 – 8t³ At t = 1s the speed of the second particle as measured in the frame of the first particle is given as √v Then v (in m / s ) is