A ball is thrown vertically downward from the roof of a building. It passes a window 12.0 m below the roof with a speed of 22.0 m/s. It lands on the ground 3.50 s after it was thrown. (a) What was the initial velocity of the ball? (b) How tall is the building? (c) Illustrate with a

A hoodlum throws a stone vertically downward with an initial speed of 12.3 m/s from the roof of a building, 20.0 m above the ground. (a) How long does it take the stone to reach the ground?(b) What is the speed of the stone at impact?

A rocket is launched from the ground with the upward velocity of 140 m/s. There is no engine working on the rocket while is is flying up. What is the maximum height the rocket reaches?

An attacker at the base of a castle wall 3.55 m high throws a rock straight up with speed 8.30 m/s from a height of 1.60 m above the ground. (a) Will the rock reach the top of the wall? Yes O No (b) If so, what is its speed at the top? If not, what initial speed must it have to reach the top? m/s (c) Find the change in speed of a rock thrown straight down from the top of the wall at an initial speed of 8.30 m/s and moving between the same two points. m/s (d) Does the change in speed of the downward-moving rock agree with the magnitude of the speed change of the rock moving upward between the same elevations? O Yes No (e) Explain physically why it does or does not agree.