Ahorizontal force of magnitude 34.0 n pushes a block of mass 3.93 kg across a floor where the coefficient of kinetic friction is 0.565. (a) how much work is done by that applied force on the block-floor system when the block slides through a displacement of 3.22 m across the floor? (b) during that displacement, the thermal energy of the block increases by 37.2 j. what is the increase in thermal energy of the floor? (c) what is the increase in the kinetic energy of the block?

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