How does the setup shown in the picture affect
the mechanical advantage required to lift the
clay block?
the setup decreases the amount of
force required to lift the block and,
therefore, increases the mechanical
advantage.
the setup increases the amount of
force required to lift the block and,
therefore, decreases the
mechanical advantage
the setup does not change the
amount of force required to lift the
block.

You have two photos of a person walking. one shows the person at the corner of third and main streets, the other shows the person at the corner of tenth and main streets. there are lampposts at every corner in this town, and the first picture shows it to be 10: 32: 00 exactly. the second picture shows it to be 10: 49: 30. you know three facts: (1) all of the clocks are synchronized; (2) there are exactly 12 equal-sized blocks per kilometer in this town; and (3) the streets that cross main in this area are numbered consecutively, with no interruptions. what is the person’s average speed in kilometers per hour?