Un bat de beisbol ejerce una fuerza promedio de 50n sobre una pelota durante 0.40s.¿ que impulso recibio la pelota tras ser bateada una pelota? De beisbol de 0.11 kg se separa de bat con una rapidez horizontal de 36m/s si el bat esta en contacto con la pelota or 0.5 s ¿cual es el valor de la fuerza horizontal promedio que ejerce el bat en la pelota?

Aball tossed vertically upward from the ground next to a building passes the bottom of a window 1.8 s after being tossed and passes the top of the window 0.20 s later. the window is 2.0 m high from top to bottom. what was the ball's initial velocity? the unit vector j^ is directed upward. how far is the bottom of the window from the launch position? how high does the ball rise above the launch position?

15. one purpose of the tread pattern on a tire is to a reduce tire wear. b. reduce traction c. allow water to flow away from the tire. d. look impressive.

Red light strikes a metal surface and electrons are ejected. if violet light is now used with a 10% greater intensity, what will happen to the ejection rate (number of ejected electrons per second) and the maximum energy of the electrons? a) greater ejection rate; same maximum energyb) same ejection rate; greater maximum energyc) greater ejection rate; greater maximum energyd) same ejection rate; same maximum energye) none of the above answers are correct