2006-11-13 00:14:41 · 3 answers · asked by jo b 1 in Science & Mathematics ➔ Other - Science
The LEVER is a rigid bar which is free to turn about a fixed point (fulcrum). There are many types of lever. First order lever- The load and effort are on the either side of the fulcrum; Eg:- See-saw. Second order lever- The load is between the fulcrum and the effort; Eg:- Nut-cracker. Third order lever- the effort acts between the fulcrum and the load; Eg:- Knife. The PULLEY consists of a wheel with a grooved rim. The wheel is supported within a frame called a BLOCK and is free to rotate about a central axis. The pulley is commonly used for lifting loads. A single fixed pulley acts as a first order lever. (A single fixed pulley does not increase or decrease force).
2006-11-13 00:35:46 · answer #1 · answered by Anonymous · 2⤊ 0⤋
Mechanical Advantage.
2006-11-13 12:20:49 · answer #2 · answered by moosa 5 · 0⤊ 0⤋
a pulley is a lever?
a lever is something that help us to lift a heavy load using less force...grr....i forgotten..lol
2006-11-13 00:22:25 · answer #3 · answered by annann 2 · 0⤊ 1⤋