Assertion: pulley | /r/HasProperty | added
Facets:
Source sentences:
text: As in the case of diagram 2a, another pulley may be added to reverse the direction of the lifting force, but with no increase in advantage.
text: For real pulleys, however, friction between the rope and pulleys will increase as more pulleys are added, to the point that no advantage is possible.
text: The more pulleys that are added, the longer it may take to lift an object, but it will be much easier to lift the load.
text: If too many pulleys are added, friction in the system will prevent much of the advantage of the pulley system, as the force exerted on pulling the rope through the system will increase.
text: It can be seen from the other systems that this principle applies more so as more pulleys are added.
text: Using more than one pulley decreases the amount of force needed to lift an object by one half each time a pulley is added, though twice as much rope is also required.