A steel cable supports a lift that can carry a maximum load of 1600Kg and it moves with an acceleration (a). (Young modulus of steel (Y)=3x1011 N/m2. Proportional limit stress =2x1010N/m2). Determine whether the maximum tension in the cable occurs as the lift is ascending or descending. And if this maximum tensile force is 25 KN, determine the value of the acceleration (a)?

Aparticle of mass m is placed in a one-dimensional box of length l. the box is so small that the particle’s motion is relativistic, so that e p2/2m is not valid. (a) derive an expression for the energy levels of the particle using the relativistic energy–momentum relation and the quantization of momentum that derives from connement. (b) if the particle is an electron in a box of length l 1.00 1012 m, nd its lowest possible kinetic energy. by what percent is the nonrelativistic formula for the energy in error?