For Somethings
Pulleys are used to lift objects
The number of ropes supporting the pulley and the strength of those ropes.
a pulley and wheel and axle
A pulley can help us in life so we don't have to lift heavy things on our own
Straining to life heavy objects can cause a male to get a hernia. It can also cause back issues if he doesn't lift correctly.
The pulley was discovered to lift objects that would otherwise be too heavy to lift. Much in the way a crane is used to lift cargo onto ships.
The lever.
Pulleys reduce the force required to lift heavy objects.
pulley, weels and axle. trust it
pulley, weels and axle. trust it
A pulley is a simple machine that has a grooved wheel that holds a rope or a cable. This is used to lift heavy loads. It is also known as sheave or drum.