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May 18, 2017 ... An easy-to-follow explanation of how pulley wheels help you lift more by multiplying your ... But did you know science can make you strong too?


Apr 26, 2017 ... By using a pulley, we do not have to pull up on a rope to lift a heavy object .... Simple machines make work easier by creating a mechanical ...

Feb 14, 2012 ... Pulley is a simple machine and comprises of a wheel on a fixed axle, with a ... the direction of where you need to use force, NOT make it easier. ... Do you know how a #pulley makes life easier? .... Pulley is a wheel over which a rope or belt is passed for the purpose of transmitting force and doing work.


Jan 10, 2017 ... They are based on the work-energy principle. ... An I think the compound pulley is the coolest simple machine. .... What if you want to do 50 joules of work and instead of pushing with 10 newtons, you just ... To make it interesting, the force that pulls down must move a greater distance than the box rises up.


A pulley makes work easier by redirecting and amplifying force. It helps reverse the direction of an individual's lifting force. As a user pulls a rope down, the ...


Apr 24, 2017 ... The purpose of a pulley system is to be able to move a heavy object with ... in that pulling down on the rope is easier than pulling up on the object. ... The simple pulley mentioned above can even have a pulley added to create ...


A pulley is simply a collection of one or more wheels over which you loop a rope to make it easier to lift things. Pulleys are examples of what scientists callsimple ...


Dec 12, 2014 ... Humans have invented six devices that combine to make work easier. ... and axle , the lever, the inclined plane, the pulley, the screw and the wedge. ... us with the means to do many things that we could never do without them.


But if you keep to an easy jog, you could go for a mile or more, and if you ... Pulleys make it possible to exert the same effort over a longer time, ...