hesspulley

Pulley

-a grooved wheel around which is wrapped a rope, chain, or cable.(fixed pulley, movable pulley, pulley systems)

The Ideal Mechanical Advantage -of a pulley:system is to equal to the number of sections of the rope that supports the object.

Try This: 1st-place the two chairs back to back 3 feet (1 meter) apart. 2nd-Put the broom handle between the chair backs forming a bar. 3rd-Have your friend hold the broom steady. 4th-Use the scissors to cut a length of the string twice the distance from the broom handle to the floor. 5th-Use one end of the string to tie a knot around the handle of the bucket. 6th-Put the bucket on the floor under the broom handle. 7th-Put some coins in the bucket for weight. 8th-Place the free end of the string up and over the broom handle. 9th-The broom handle acts as your pulley.

-2 chairs with open b-scissors -string -small bucket with a handle -coins (fo -broom -friend || **[]**
 * Materials-
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 * [|http://www.coe.uh.edu/archive/science/science lessons/scienceles1/pulley.htm]**
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 * [|http://www.usoe.k12.ut.us/curr/science/sciber00/8th/machines/sciber/machines6.htm]**
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 * [|http://www.swe.org/iac/lp/pulley 03.html]**
 * [|http://www.edinformatics.com/math science/simple machines/pulley.htm]** ||  ||





Everyday Examples Of a Pulley:

-opening curtains -winch -elevator -escalator -garage opener(garage door, when it opens) 