three classes of levers animation

Force Work Power Energy and Machines..

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 world" A ..

Here the power is in the middle and the weight and fulcrum on either side. For example the flexing of the elbow of forearm. Here the elbow joint acts as fulcrum, and the distal part of hand provide resistance. The contracting biceps muscles exert the effort in between fulcrum and resistan..

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

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..

Mole Concept and Stoichiometry..

In this type of lever the effort and the resistance (load) are situated on either side of the fulcru..

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..

Animal Classification - The animal kingdom is classified into distinct groups based on the body organisation discussed above. The following scheme provides an outline classification of the animal kingdom into the ten major phyla: fig. 10.3 -Phylogenetic Tree ..