Author: misamaliraza94
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What is Friction?
Friction is defined as the resistance offered by the surfaces that are in contact when they move past each other. Friction provides traction that is needed to walk without slipping. Friction is helpful in most cases. However, they also offer a great measure of opposition to the motion. In addition, about 20 per cent of…
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Introduction
Friction When we throw a ball on the floor, it starts moving with some velocity. But ideally, no force should be acting in the direction of motion, and according to Newton’s first law, the ball should keep rolling, but this does not happen. Instead, the ball stops after moving a certain distance, so a force…
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SI Unit of Force
The Force can be measured using a spring balance. The SI unit of force is Newton(N). Common symbols: F→, F SI unit: Newton In SI base units: kg·m/s2 Other units: dyne, poundal, pound-force, kip, kilo pond Derivations from other quantities: F = m a Dimension: LMT-2
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Pressure
The force, applied on a unit area of a surface is known as pressure Pressure=force/areaonwhichitactsPressure=force/areaonwhichitacts. If the area is smaller, then the pressure on a surface would be greater; e.g. this is the reason that the area of one end of a nail is pointed toexertsufficientpressuretoexertsufficientpressure and other end is bigger asshownintheimagegivenbelowasshownintheimagegivenbelow. This envelop of air is known as the atmosphere that…
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Introduction
When an object is either pushed or a pulled is known as a force. Motion, generated in an object, is because of an action of a force. The applied force makes the table move in a given direction. The strength of a force is commonly expressed by the magnitude. Force also has direction; likewise, if…
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Nobel Prize In Physics
Introduction The Nobel Prize in Physics is the most prestigious award given yearly by the Royal Swedish Academy of Sciences. The Noble prize is given to those physicists who conferred the most outstanding contributions for mankind (in physics). Wilhelm Röntgen, a German/Dutch physicist, was the first person who had received the first Nobel Prize in…
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Inventions and Inventors in Physics
The following table illustrates the major inventions and their inventors in physics uses − Invention Inventor Centigrade scale Anders Celsius Watch Peter Henlein Radio Guglielmo Marconi Telephone Alexander Graham Bell Electricity Benjamin Franklin Electric Light Bulb Thomas Edison Thermometer Galileo Galilei Telescope Hans Lippershey and Zacharias Janssen; later Galileo Telegraph Samuel Morse Cosmic Rays Victor…
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Major Instruments and Their Uses
The following table illustrates the major scientific instruments and their uses − Instrument Use Accelerometer Measures acceleration Altimeter Measures altitude of an aircraft Ammeter Measures electric current in ampere Anemometer Measures wind speed Barometer Measures atmospheric pressure Bolometer Measures radiant energy Caliper Measures distance Calorimeter Measures heat (in chemical reaction) Crescograph Measures growth in plant…
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Physics – Measurement Units
The following table illustrates the major measuring units in physics − Mass And Related Quantities Quantity Symbol Unit Density ρ kg.m-3 Volume V m-3 Force F Newton (N) Torque M N.m Pressure P Pascal (Pa) Dynamic viscosity η Pa.s Acoustic pressure p Pascal (pa) Dynamic volume v m3 Electricity and Magnetism Quantity Symbol Unit Power…
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Physics – Branches
The following table illustrates the major branches and their sub-branches) of physics − Branch/Field Sub-branch/Sub-field Classical mechanics Newtonian mechanics Analytical mechanics Celestial mechanics Applied mechanics Acoustics Analytical mechanics Dynamics (mechanics) Elasticity (physics) Fluid mechanics Viscosity Energy Geomechanics Electromagnetism Electrostatics Electrodynamics Electricity Thermodynamics and statistical mechanics Heat Optics Light Condensed matter physics Solid state physics High…