A tennis ball machine fires a ball vertically up wards at times t=0 at 19.6 m/s. Assume that air resistance negligible and take g=9.8m/s2. A,calculate the displacement and velocity of the ball at t=1.0s ,2.0s,3.0s and 4.0s.
Answer
just use your usual formulas:
h(t) = v0t - 1/2 gt^2
v(t) = v0 - gt