physics machines levers

Levers - 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 m..

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..

Force Work Power Energy and Machines..

In all the above examples, a machine either multiplies or reduces the effect of the force that is applied. A bicycle is a machine which is used to gain speed. We gain speed by exerting additional force. When we try to ride a bicycle up a steep hill, we soon realize that we gain ..

In class III levers effort is situated between the load and the fulcrum. (shown in the figure below) ..

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 the effort E at A. The fulcrum of the lever is at F as shown in the figure belo..

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..

Summary - Machine is a device that is used to multiply force, or to gain speed, or to change the direction of a force, or transform energy. Levers, pulleys, inclined plane and gears are some of the examples of simple machines..

The principle of moment is applied in simple machines like the lever. A beam balance also works on the principle of moment..

Wheel and Axle - Figure above shows a wheel and axle. At one end of the axle, a wheel of a greater diameter is fixed. The axle and the wheel both rotate about the same axis. Ropes have been wound around both the wheel and the axle. The load can be lifted by pulling on the rope around the wheel once..