Two blocks of mass 500.0 g and 200.0 g are suspended vertically as shown in the diagram. The top string is lifted vertically upward exerting a force of 8.48 N on the
500.0-g block. Calculate:
a) At what rate do the blocks rise?
b) How much tension must the string connecting the two blocks withstand so it
does not break when the blocks accelerate upward?
(c) If the string connecting the two blocks can withstand only 6.00 N, what
maximum force can be exerted on the upper string without the bottom string breaking?