It works much more effectively, and with greater dedication, focus, and commitment, than an ailing pulley does.
The cabin of the lift is raised (and lowered) by a pulley. The pulley has a counterweight, which weighs as much as an empty cabin. Therefore, the wheel at the top of pulley does not need to lift the entire weight of the cabin - just the extra load in the cabin.
The pulley in the mechanical device work together to make the lift move up and down. Counter weights.
The block and tackle (or pulley system) was brought to us by Archimedes (287BC - 212BC) in Greece, but neither Archimedes, nor any who wrote about him and his extraordinary work dated the invention.stupid answer
The pulley makes work of lifting easier then lifting by hand.
No, a pulley redistributes the work making it easier but at the end of the pull it will be the same amount of work.
Pulley reduces the force given to get the work done. There are amny types of pulleys. Examples are fixed pulley, movable pulley and Combined pulley.
M.a. of a pulley is how much the machine makes work easier
The difference between a fixed pulley and a movable pulley is, the wheel of a fixed pulley does not move because the wheel is attached to a wall, ceiling, or other object. Unlike a fixed pulley, a movable pulley's wheel does move. The wheel on a movable pulley is not attached to a wall or other object. A fixed pulley changes work by changing the direction of a force. A movable pulley changes work by reducing the input force needed to lift heavy objects. A movable pulley changes the direction of the input force and reduced it. A movable pulley also increases the output force.
The WORK is the same. Work = force times distance. If the pulley allows you to pull half as hard, you will have to pull over twice the distance (length of rope), making the same total work. (Ignoring friction; you would actually have to do slightly more work to overcome the friction in the pulley.)
The Answer is no.
No. If you are, say, lifting a weight the amount of work done is the same whether you use a pulley or not. However, you may not be able to actually lift the weight unless you use a pulley. But the amount of work done will be the same with or without the pulley.
The difference between a fixed pulley and a movable pulley is, the wheel of a fixed pulley does not move because the wheel is attached to a wall, ceiling, or other object. Unlike a fixed pulley, a movable pulley's wheel does move. The wheel on a movable pulley is not attached to a wall or other object. A fixed pulley changes work by changing the direction of a force. A movable pulley changes work by reducing the input force needed to lift heavy objects. A movable pulley changes the direction of the input force and reduced it. A movable pulley also increases the output force.
ME=work output/ work input x 100%ME=42/50(100)ME=84
It shaves a belt.
Ropes or cables run around pulleys and each pulley wheel reduces the pulling effort.
It works much more effectively, and with greater dedication, focus, and commitment, than an ailing pulley does.