physics
posted by bobby .
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?

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
Respond to this Question
Similar Questions

physics
a boy who is 1.5m tall throws a ball into the air the ball attains a height a of 3m above the boy's head and then falls back to the ground the boy's hand was 1.2 m above the ground when he released the ball how long does it take to … 
Physics
A ball is thrown straight up and rises to a maximum height of 21 m above the ground. At what height is the speed of the ball equal to half of its initial value? 
Physics
A ball is thrown straight up and rises to a maximum height of 24 m above the ground. At what height is the speed of the ball equal to half of its initial value? 
physics
Julie throws a ball to her friend Sarah. The ball leaves Julie's hand a distance 1.5 meters above the ground with an initial speed of 12 m/s at an angle 35 degrees; with respect to the horizontal. Sarah catches the ball 1.5 meters … 
Physics
A ball is thrown straight up and rises to a maximum height of 20 m above the ground. At what height is the speed of the ball equal to half of its initial value? 
Pre calc
Alice throws a ball straight up with an initial speed of 40 feet per second from a height of 5 feet? 
Pre Calc
Alice throws a ball straight up with an initial speed of 40 feet per second from a height of 5 feet? 
Physics
You toss a tennis ball straight upward. At the moment it leaves your hand it is at a height of 1.5 m above the ground, and it is moving at a speed of 8.0 m/s. (a) How much time does it take for the tennis ball to reach its maximum … 
Physics
You toss a tennis ball straight upward. At the moment it leaves your hand it is at a height of 1.5 m above the ground, and it is moving at a speed of 7.8 m/s. (a) How much time does it take for the tennis ball to reach its maximum … 
Physics
You toss a tennis ball straight upward. At the moment it leaves your hand it is at a height of 1.3 m above the ground, and it is moving at a speed of 7.4 m/s. (a) How much time does it take for the tennis ball to reach its maximum …