Question

a
A tennis ball is hit vertically
upward with a velocity of 30 ms-1.
It takes 3 s to reach the highest
point. Calculate the maximum
height reached by the ball. How
long it will take to return to
ground?

Answer 1

h=vot-1/2gt²

h=30 x 3 - 1/2 x 9.8 x 3²

h = 45.9 m

t = 2to

t = 2 x 3 = 6s