Pulleys

media type="custom" key="8686302" align="left"

In other setups, the rope moves many times farther than the load therefore requiring many times less force to lift the load.
===

===

= =

***Downward pull ropes (a,c.d.e) are not counted as lifting ropes.
1 lifting rope ||= ===Work (Rope) = Work (Load)===
 * = =Pulley Setup= ||= =Working Function= ||
 * = =a=

Force (Rope) x 1 = Force (Load) x 1
|| The force on the rope is equal to the force of the load. (Each lifting rope needs to move 1 inch for the load to move 1 inch.) (1 lifting rope moving 1 inch equals a total of 1 inch of the rope to the load's 1 inch.) || 2 lifting ropes ||= ===Work (Rope) = Work (Load)===
 * = Explanation || The distance the rope moves down is equal to the distance the load moves up.
 * = =b=

Force (Rope) x 2 = Force (Load) x 1
|| The force on the rope is 2 times less than the load. (Each lifting rope needs to move 1 inch for the load to move 1 inch.) (2 lifting ropes each moving 1 inch equals a total of 2 inches of the rope to the load's 1 inch.) || 2 lifting ropes ||= ===Work (Rope) = Work (Load)===
 * = Explanation || The distance the rope moves is 2 times the distance the load moves.
 * = =c=

Force (Rope) x 2 = Force (Load) x 1
|| The force on the rope is 2 times less than the load. (Each lifting rope needs to move 1 inch for the load to move 1 inch.) (2 lifting ropes each moving 1 inch equals a total of 2 inches of the rope to the load's 1 inch.) || 3 lifting ropes ||= ===Work (Rope) = Work (Load)===
 * = Explanation || The distance the rope moves is 2 times the distance the load moves.
 * = =d=

Force (Rope) x 3 = Force (Load) x 1
|| The force on the rope is 3 times less than the load. (Each lifting rope needs to move 1 inch for the load to move 1 inch.) (3 lifting ropes each moving 1 inch equals a total of 3 inches of the rope to the load's 1 inch.) || 4 lifting ropes ||= ===Work (Rope) = Work (Load)===
 * = Explanation || The distance the rope moves is 3 times the distance the load moves.
 * = =e=

Force (Rope) x 4 = Force (Load) x 1
|| The force on the rope is 4 times less than the load. (Each lifting rope needs to move 1 inch for the load to move 1 inch.) (4 lifting ropes each moving 1 inch equals a total of 4 inches of the rope to the load's 1 inch.) || A Pulley System Simulation
 * = Explanation || The distance the rope moves is 4 times the distance the load moves.

[|Pulley Simulation at the compassproject]

You can choose from a selection of Pulley Systems and compare the distance of movement of the Effort and Load to the force of the Effort needed to move the Load force.

You can modify the Setup to include Force of the Load =.1 Newtons to 10 Newtons Distance to Lift(Load )= .1 Meter (10 centimeters) to .2 Meters (20 centimeters) Friction leave at 0 Pulley diameter can be kept at .2 Meters (20 centimeters)

Note:The Work (Input) from your Effort and the Work(Output) from the Load being moved are in units of Joules (J) 1 Joule is equal to 1 Newton-Meter (NM). In class, we have used centimeters in our measurement of distances so have used work units of Newton-Centimeter and not Newton-Meters (Joule).