According to Ohio University, there are three main classes of levers. These are distinguished by the relative locations of the load, effort and fulcrum along the lever. A second-class lever is one in which the load, or the item being lifted, is found between the effort and the fulcrum, or pivot point.
First-class levers are those which have the fulcrum placed between the load and the effort. Examples of first-class levers are the seesaw and crowbar. On a seesaw, for example, the person on the higher end of the plank acts as the effort, applying a downward force to the end of the lever. The person on the other end is the load, and the point at which the plank pivots is the fulcrum.
Ohio University lists the wheelbarrow as an example of a second-class lever. The effort is applied to the handles, the axle of the wheel acts as the fulcrum or pivot point, and the load is found in the middle.
Third-class levers are those in which the load and fulcrum are located at opposite ends of the lever with the load placed between them. An example of this class of lever is the hammer. When used to pound a nail into a board, the user's wrist is the fulcrum, the point at which the hand contacts the hammer is the effort, and the resistance of the wood to pounding is the load.Learn More
The basic properties of the Laplace transform include linearity, time delay, first derivative, second derivative, Nth order derivative, integration, initial value theorem and final value theorem. Two of its most critical applications are to differential equations and convolution. The linearity element of the Laplace transform holds the following equation: a x f(t) + b x g(t)?a x F(s) + b x F(s).Full Answer >
Werner Heisenberg was a GermanÂ physicist best known for formulating various theories, including the S-matrix theory in particle scattering, the uncertainty principle and the quantum theory on ferromagnetism. In 1932 he won the Nobel Prize inÂ Physics for his theory on quantum physics.Â He also wrote over 600 research papers.Full Answer >
Isaac Newton lived from 1643 to 1727. The first Nobel prizes were awarded in 1901 so Isaac Newton could not have won a Nobel prize.Full Answer >
Some charged objects attract one another because opposing charges create an attractive force. If one object is positively charged and the other is negatively charged, the resulting magnetic force draws them together, but two objects that share the same charge repel one another.Full Answer >