instead of rolling down the ramp over the step, imagine the ball falls off the back of the ramp and directly to the ground. what is the amount of potential energy remaining after the ball lands on the ground

Explain why the aperture of the spherical mirror should be small compared to the radius of curvature of the mirror.

If the speed of a particle triples ,by what factor does its kinetic energy increase?

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