examples of first order levers

The distance AF is called the effort arm and the distance BF is called the load arm. If the lever is in equilibrium, then by applying the principle of moments about the fulcrum, we get Clockwise moment = Anticlockwise moment Effort x Effort arm = Load x Load arm The ratio of the effort..

In this the weight is in the middle between the power and the fulcrum. For example human body resting on toes. Here the toe forms the fulcrum and contracting calf muscle provides effor..

In these type of levers the load is situated between fulcrum and effor..

In class III levers effort is situated between the load and the fulcru..

A simple crowbar can be used to lift a heavy rock with a small effort. The crowbar is an example of a lever. The use of levers was known to the ancient Greeks, and it is reported that Archimedes once remarked "Give me a lever long enough and I will move the w..

Levers of the 1 st Order [Class I Levers] - In this type of lever the effort and the resistance (load) are situated on either side of the fulcrum. Let us consider the lever AB which is used to overcome a load L at B by applying t..

Levers of the 2 nd Order [Class II Levers] - In these type of levers the load is situated between fulcrum and effort.(shown in the figure belo..

Levers of the 3 rd Order [Class III Levers] - In class III levers effort is situated between the load and the fulcrum. (shown in the figure belo..

As a typical example the mechanism in Salvia is described. The flower has a bilipped corolla. There are two stamens and each stamen has two anther lobes which are separated from one another by a long connective. One anther lobe is fertile and the other is sterile. The insect lands on the..

To increase the turning effect of force, it is not necessary to increase the magnitude of the force itself. We may increase the turning effect of the force by changing the point of application of force and by changing the direction of forc..