A small block of mass m is kept on a bigger block of
mass M which is attached to a vertical spring of spring
constant k as shown in the figure. The system oscillates
vertically. (a) Find the resultant force on the smaller
block when it is displaced through a distance x above
its equilibrium position. (b) Find the normal force on the
smaller block at this position. When is this force smallest
in magnitude ? (c) What can be the maximum amplitude
with which the two blocks may oscillate together ?
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