Flat Stanley starts his quest to learn knowledge about pulleys.
Pulleys are used to lift objects. With one pulley at the top, there is a 1:1 ratio.
The force needed to lift the load is the same as the load.
With one movable pulley there is a 2:1 ratio.
The force needed to lift the load is 1/2 the load, but you will pull line 2 times the height lifted.
With two moveable pulleys there is a 4:1 ratio.
The force needed to lift the load is 1/4 the load, but you will need to pull line 4 times the hight lifted.
Flat Stanley is excited about what he learned about pulleys. He is able see how this knowledge
is related to math and science.
Flat Stanley starts his quest to learn knowledge about pulleys.
Pulleys are used to lift objects. With one pulley at the top, there is a 1:1 ratio.
The force needed to lift the load is the same as the load.
With one movable pulley there is a 2:1 ratio.
The force needed to lift the load is 1/2 the load, but you will pull line 2 times the height lifted.
With two moveable pulleys there is a 4:1 ratio.
The force needed to lift the load is 1/4 the load, but you will need to pull line 4 times the hight lifted.
Flat Stanley is excited about what he learned about pulleys. He is able see how this knowledge
is related to math and science.
Flat Stanley Audio File