Amotorboat traveling 4 m/s, east encounters a current traveling 3.0 m/s, north. a) what is the resultant velocity of the motorboat? b) if the width of the river is 80 meters wide, then how much time does it take the boat to travel shore to shore? c) what distance downstream does the boat reach the opposite shore?

Determine el momento angular de un rueda de 3000g moviendose a 10m/s con un radio de giro de 400cm

At a certain instant after jumping from the airplane a, a skydiver b is in the position shown and has reached a terminal (constant) speed vb = 52 m/s. the airplane has the same constant speed va = 52 m/s, and after a period of level flight is just beginning to follow the circular path shown of radius ρa = 2330 m. (a) determine the velocity and acceleration of the airplane relative to the skydiver. (b) determine the time rate of change of the speed vr of the airplane and the radius of curvature ρr of its path, both as observed by the nonrotating skydiver.

What is the increase in density of a medium due to wave travel?