3.- PULLEYS

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