S.I.F. Study is fun

What is the Point of a Pulley? In its simplest implementation, a pulley simply turns a force in one direction into a force in another direction. This might be useful if it’s easier to apply a force in one direction than the other (e.g. to pull downwards rather than push upwards). A pulley really comes into its own when it is combined with another pulley to create a system known as a  block and tackle , allegedly invented by Archimedes in the third century BC. The simplest block and tackle, the  gun tackle , uses two pulleys, which are usually mounted above one another (for clarity, they are shown separated in the diagram below). The load (W) is shared between the tension in the rope and the mount that attaches the block and tackle to the ceiling, and thus you only have to pull with a force equal to half the weight in order to lift it. However, you will have to pull the rope twice as far and thus the conservation of energy is not violated (lifting a one hundred newton weig

Introduction of Magnetism and Matter Index ü   History ü   Definition of Magnets and Magnetism in physics ü   Source of Magnetism or Cause of Magnetism ü   Classes of Magnetic Materials ü   Definition of Matter ü   Different States of Matter ü   Relation between Matter and Magnetism ü   Conclusion ü   Frequently asked Questions (FAQs) History In the ancient world when people started noticing that Lodestones (magnetized pieces of mineral magnetite) was able to attract iron it was then only when the concept of magnetism was introduced. Indian surgeon  Surushastra  was the first person to use magnets for surgical purposes.   Definition of Magnets and Magnetism in physics Magnets:  The ability of an object or a material to produce invisible magnetic field lines in order to develop a force which attracts other ferromagnetic materials such as iron, steel, etc. are known as  Magnets . Magnetism:  Magnetism is a pheno

Young's Modulus Our Objective Our aim is to determine the Young’s modulus of elasticity of the material of a given wire using Searle’s apparatus. The Theory Before we move ahead, do you know what a Searle’s apparatus is? Searle’s apparatus consists of two metal frames F1 and F2. Each frame has a torsion head at the upper side and a hook at the lower side. These frames are suspended from two wires AB and CD of same material, length and cross-section. The upper ends of the wires are screwed tightly in two torsion heads fixed in the same rigid support. A spirit level rests horizontally with  one end hinged in the frame F2. The other end of the spirit level rests on the tip of a spherometer screw, fitted in the frame F1. The spherometer screw can be rotated up and down along a vertical pitch scale marked in millimeters. The two frames are kept together by cross bars E1 and E2.  Do you know Searle’s apparatus works on the principle of Hooke’s law?  Hooke’s law can be e