(a) The ball has some initial speed v0 (which we don’t know). We know the acceleration of the ball, namely a = −g = −9.80 m/s2 . We also know that
at t = 2.00 the y coordinate of the ball was zero. (As usual, we say the ball starts ** at y = 0.)
(b) We know that at maximum height the velocity v is zero. We can use.
so the maximum height attained by the ball was 4.90 m.
