Se lanza una bola verticalmente hacia arriba y alcanza una altura máxima de 21,4 m. A. Calcula la rapidez con la que se lanza la bola. B. Explica ¿qué supuestos has tenido en cuenta? C. Determina ¿dónde estará la bola al cabo de 3,05 s de su lanzamiento? D. Calcula ¿cuál será su velocidad en ese momento?

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?