2. A ball is thrown horizontally off of a building 67 m above the ground. When the ball hits the ground, it has traveled a horizontal distance of 19 m.
Determine the speed at which the ball was moving after being thrown. Ignore air resistance and use 9.8
m/s2 for acceleration due to gravity.

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