A pulley is a wheel with a grooved rim. It uses to lift heavy loads. They could be fixed o Moveable pulleys. A set of moveable pulley is a hoist. They maight be trocho or sieze.
In this video you have information about them
ACTIVITIES
1.-If you want to lift 20 kg using a pulley How many kg do you have to do?
a) With a fixed pulley
b) With a movable pulley
c) With a trocho hoist of 3 movable pulleys
d) With a size hoist of 2 movable pulleys
2.- Draw the forces and pulleys of the exercise 1
HOMEWORK
Sumarize the lesson
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