Aswimmer swims north at 0.10 m/s relative to still water across a river that flows at 0.25 m/s from east to west. calculate the swimmer's velocity relative to the riverbank. no guessing. showing work is optional but appreciated

Which diagram correctly demonstrates the various forces acting on a ball moving horizontally with some speed?

For the car in the picture ,in which direction is the normal force? -into the screen -down -out of the screen -up

It may seem strange that the selected velocity does not depend on either the mass or the charge of the particle. (for example, would the velocity of a neutral particle be selected by passage through this device? ) the explanation of this is that the mass and the charge control the resolution of the device--particles with the wrong velocity will be accelerated away from the straight line and will not pass through the exit slit. if the acceleration depends strongly on the velocity, then particles with just slightly wrong velocities will feel a substantial transverse acceleration and will not exit the selector. because the acc