1) it doesn't. Work = force x distance. So a pulley that reduces force will also increase distance -
but -
it can reduce the force needed to move something
thus making life easier.
Answer:
It depends on the number of pulleys and their arrangement. A single pulley does not change the force required to lift something. But, other pulley arrangements do. Four pulleys can be arranged into a thing called a block & tackle that can divide the force required to lift something by four. But, the rope must be extended four times as long to do this.
pulleys allow work to be easier because they lift the stuff up for you but they don't do work for you, it just makes it easier
pulleys allow work to be easier because they lift the stuff up for you but they don't do work for you, it just makes it easier
by changing the direction of input force
A fixed pulley does not make the force applied easier, it changes the direction of this force. For example, instead of bending over and lifting and object, a fixed pulley lets you lift it by pulling down on a rope.
M.a. of a pulley is how much the machine makes work easier
The pulley makes work of lifting easier then lifting by hand.
pulleys allow work to be easier because they lift the stuff up for you but they don't do work for you, it just makes it easier
pulleys allow work to be easier because they lift the stuff up for you but they don't do work for you, it just makes it easier
it deacreases the input force
by changing the direction of input force
A fixed pulley does not make the force applied easier, it changes the direction of this force. For example, instead of bending over and lifting and object, a fixed pulley lets you lift it by pulling down on a rope.
No, a pulley redistributes the work making it easier but at the end of the pull it will be the same amount of work.
M.a. of a pulley is how much the machine makes work easier
Yes. It can also decrease the amount of work needed in exchange for a long distance.
You don"t have to pull the full weight. They reduce the force needed to move an object.
it clicks on
yes