VELOCITY RATO OF ONE SINGLE FIXED
PULLEY AND ONE SINGLE MOVABLE
PULLEY IN AN ARRANGEMENT
Answers
Answer:
There are two answers depending on the configuration. Most commonly, the rope would be fixed to or near the fixed pulley, pass over the load pulley and then over the fixed pulley again. In that case the velocity ratio is 2:1 (you pull the rope twice as far as the load moves). If you reverse the roles of the load and fixed pulleys, the ratio is 3:1. The ratio is just the number of ropes at the load pulley. In the second case the ratio is 2:1 relative to the load pulley, but relative to the fixed pulley it is 2:1.
There is a third answer. Suppose there is a rope attached to the load that passes over fixed pulley and has a pulley on the other end. Another rope attached to the load and passes over this pulley. An exercise for you is to find the velocity ratio in that case. Think what happens if the load moves 1 cm.