Posted by bobby on .
Anne throws a ball straight up releasing it from her hand with an initial speed of 20 m/s. The ball is at a height of 1.5 m above the ground when it is released. Determine the maximum height of the ball? Calculate the ball’s speed just before it hits the ground?

physics 
Elena,
h=vₒ²/2g=400/2•9.8=20.4 m
H=20.4+1.5=21.9 m
v=sqrt(2gH) = sqrt(2•9.8•21.9) = 20.7 m/s