Answer to Question #57854 in Mechanics | Relativity for krishna

Question

You are on the roof of a building that is 150 m tall armed with a tennis ball launcher that fires tennis balls with a speed of 35 m/s. Another building is 100 m away from your building. You are trying to fire a tennis ball into a window of the other building that is 10 m below your current height. Knowing that the ball will fall as it travels you first align the launcher so that it is completely horizontal, hoping that fall the necessary 10 m as it reaches the building
a)how long does it take for the ball to reach the building?
b)Does the ball go through the window?If not where does the ball hit the building?
c)If you want the ball to go through the window at what angles could you aim the launcher?
d)For each angle in (c) find the time for the ball to reach the window
e) Sketch the two trajectories that the ball could take to go through the window.Explain why the times you found in (d) are different?