UY1: Resistive Forces

Interaction between moving object and medium (liquid, gas) sometimes cannot be neglected. The medium exerts a resistive force $f$ on the object opposite to its direction of motion. (Common example: Air resistance) The magnitude of the resistive force, $f$, generally increases with increasing speed. The actual dependence of the magnitude of the resistive force with the speed is complicated. Hence, …

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UY1: Newton’s Laws Of Motion

This is a recap of what you have learned in high school and pre-university. If you require more details, you can visit Forces And Turning Effect Of Forces (O Levels) and/or Forces And Dynamics (A Levels). Newton’s Laws of motion describes the relationship between the motion of a body (kinematics) and the mass and forces acting on it. Newton’s Laws …

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UY1: 2-D Kinematics

This is a recap of what you have learned in high school and pre-university. If you require more details, you can visit Speed, velocity & acceleration (O Levels) and/or Kinematics (A Levels). Coordinate Systems Coordinate systems are required to describe the position of a point in space. 1D line: requires one coordinate 2D plane: requires two coordinate 3D space: requires …

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UY1: 1-D Kinematics

This is a recap of what you have learned in high school and pre-university. If you require more details, you can visit Speed, velocity & acceleration (O Levels) and/or Kinematics (A Levels). Kinematics Kinematics describe motion in terms of space and time. The types of motion are translational, rotational and vibrational. Particle approximation: We first assume that the moving object …

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UY1: Basics For Mechanics

This post serves to provide you with the basics for the learning of Mechanics. The content on this page should be familiar to you. Quantities & Units Experiments require measurements of physical quantities. Every measurement give a number whose value depends on the units that goes with it. There is a need to agree on certain important basic physical quantities and …

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UY1: Einstein’s Postulates of Special Relativity & Inertia Frames

Einstein’s First Postulate states that the laws of Physics are the same in every inertial frame of reference. Inertial Frames An inertial frame of reference is a frame of reference where Newton’s first law applies in its simplest form: An object in motion stays in motion, and an object at rest stays at rest unless an external force acts on …

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UY1: Principle Of Relativity

If a system of coordinates K is chosen so that, in relation to it, physical laws hold good in their simplest form, the same laws hold good in relation to any other system of coordinates K’ moving in uniform translation relatively to K. – Albert Einstein: The Foundation of the General Theory of Relativity The Principle of Relativity states that …

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