Aball is released from a tower at a height of 100 meters toward the roof of another tower that is 25 meters high. the horizontal distance between the two towers is 20 meters. with what horizontal velocity should the ball be imparted so that it lands on the rooftop of the second building?

Afisherman notices that his boat is moving up and down periodically without any horizontal motion, owing to waves on the surface of the water. it takes a time of 2.20 s for the boat to travel from its highest point to its lowest, a total distance of 0.670 m . the fisherman sees that the wave crests are spaced a horizontal distance of 5.80 m apart. (a) how much is the wavelength? (b) find the period of the wave. (c) how fast are the waves traveling? (d) what is the amplitude a of each wave?