Question

The velocity of a single movable pulley is always 2, why?

Answer 1

Answer:

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In order to lift the load "L" by "X" meters, the effort "E" needs to travel the distance of 2X meters. (The entire rope needs to be pulled by "E" for a distance of 2X.) Since it is a ratio. it has no units of measurement

Explanation:

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Answer 2

Load "L" is attached to the movable pulley. A rope is fixed at a point in ceiling that passes through the movable pulley.

In order to lift the load "L" by "X" meters, the effort "E" needs to travel the distance of 2X meters. (The entire rope needs to be pulled by "E" for a distance of 2X.)

Now, Velocity Ratio equals (Distance traveled by "E") divided by (Distance traveled by "L")

So it becomes : 2X/X. This equals to 2

Since it is a ratio. it has no units of measurement.