You roll a ball up a hill, releasing the ball at 12 m/s. The angle of the hill gives the ball an acceleration of 6.0 m/s/s, directed down the hill. How long will it take the ball to return to you at the bottom of the hill

Velocity is a description of both speed and direction, therefore it - a vector - a force arrow - the same as acceleration - a magnitude

Which of the following is not a transverse wave? a) soundb) lightc) radiod) all of thesee) none of these

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