A light spring with force constant 3.80 n/m is compressed by 7.20 cm as it is held between a 0.300-kg block on the left and a 0.
600-kg block on the right, both resting on a horizontal surface. the spring exerts a force on each block, tending to push the blocks apart. the blocks are simultaneously released from rest. find the acceleration with which each block starts to move, given that the coefficient of kinetic friction between each block and the surface is 0, 0.067, and 0.429. (let the coordinate system be positive to the right and negative to the left. indicate the direction with the sign of your answer. assume that the coefficient of static friction is the same as the coefficient of kinetic friction. if the block does not move, enter 0.)
Two waves with the same wavelength are in phase if there phase difference is zero or an integral multiple of wavelength. Thus the integer part of any difference expressed in wavelength can be discarded.
The phase difference of 5.4 wavelength is equivalent to is one of 0.4 wavelength thus the interference is an intermediate interference close to fully destructive.
Since there's no external force beside gravity acting on the rod, we can use the law of energy conservation to calculate for the speed of rod center of gravity before hitting the surface.
Also as the rod is uniform and this, its center of gravity is at distance h/2 from the surface.
