Dawn is screwing in a screw so she can hang a picture on the wall. Because the threads are so far apart, the force that Dawn must apply to get the screw into the wall is
greater lesser
A B
The trade-off when the threads are closer together, is that more turns of the screw or bolt are needed to do the job because the distance over which the input force must be applied is greater.
input force
more
MORE
MORE
turns of the screw
greater
lesser
force
force
force