et’s think of this mechanism as a chain, with input
and output being the first and last links. The initial force
applied to the input (the first link) will be transferred through
the chain and will stop on the link of least resistance. If the
structure around our mechanism is solid, all links will have
more resistance than the mechanism’s output (the last link
of the chain), and the mechanism will work as intended: Only
the output will yield to the input. But if any link of our chain
before the output has less resistance than the output, it will
be dislocated and separated from the next link, thus breaking
the chain and preventing the mechanism from working