Question

A man has to lift a sack of sugar weghing 240 N .if he use a single fixed pulley .how much effort will he need to apply? what will be the mechanical advantage.?

Answer 1

Explanation:

Pulley does not give any mechanical advantage .it merely changes the direction of force. so you will need slightly more than 240 N counter gravitational pull to lift the weight .if you looking for mechanical advantage ,you can go for gear system.