Free fall is a situation in which the only force acting upon an object is gravity. why do all objects in free fall have the same acceleration? a) their masses are always the same b) acceleration due to gravity is always the same c) the distance between two objects is always the same d) the gravitational force between two objects are always the same

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