A ball, initially at y = 0, is thrown straight down and takes 1.50 s to move 15.5 m in the - y direction. Calculate the initial velocity of the ball.

Question

A ball, initially at y = 0, is thrown straight down and takes 1.50 s to move 15.5 m in the - y direction. Calculate the initial velocity of the ball.
Calculate the velocity of the ball at t = 0.900s.