A boy is riding his bike from his house to the corner store. The force of his pedaling forward is 60 N. The air friction
pulling against him has a force of -5 N, and the rolling friction working
against his tires is -2 N. If the boy and his bike's mass together is 83 kg,
what is his acceleration?

Aplane takes off from an airport and flies to town a, located d1 = 215 km from the airport in the direction 20.0° north of east. the plane then flies to town b, located d2 = 230 km at 30.0° west of north from town a. use graphical methods to determine the distance and direction from town b to the airport. (enter the distance in km and the direction in degrees south of west.)

Un jugador de beisbol batea un foul recto en el aire.la pelota deja el bate con una rapidez de 120 km/h. en ausencia de resistencia del aire. ? cual sera la rapidez de la pelota cuando la atrape el catcher

Because light travels in a straight line and casts a shadow, isaac newton hypothesized that light is