Blog Tag Lever

Lever

A lever is a rigid bar which can rotate about a fixed point or a fixed line, called the axis of rotation. The point or the axis of rotation is called the fulcrum. Levers are simple machines. . . .

Principal of Lever

It states that the product of an effort with effort arm is equal to the product of load with load arm. Load x Load arm = Effort x Effort arm  . . .

Levers of the first order

In this type of levers, the fulcrum is situated between the load and the effort. The effort arm may be equal or less than or more than load arm. In case the effort arm is more than load arm, a small effort is required to more load. However, if effort arm is less than load arm, a large effort is required to move load.  Examples: Sea saw, Sci . . .

Levers of the second order

In this type of levers, the load is situated between the effort and the fulcrum. In the levers of second order, the load arm is always smaller than the effort arm. Thus always less effort is required to move a heavy load.  For examples: Nut cracker, wheel barrow, oars of a boat are levers of the second order. this lever is also called force m . . .

Levers of the third order

In this types of levers the effort is situated between the load and the fulcrum. In the levers of third order, the effort arm is always smaller than the load arm. Thus more effort is required to lift a lighter load, This lever is also called speed multiplier lever as load moves through lerger distance as compared to the effort. For examples: Sugar . . .

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