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In the study of motion, there are two quantities we should understand, these are the scalar and vector quantities. A scalar quantity is described by its magnitude only while a vector quantity has both magnitude and direction. Force, velocity, acceleration, displacement and electric field are vector quantities. Speed, distance, mass, volume, time density are some examples of scalar quantities.
Published by Jessie Agudo 55 months ago in Physics | +3 votes | 0 comments
Friction is a force that opposes the sliding or rolling of one body over another. It can work for us and against us. Without friction, you would slip and fall. Friction makes cars stop too. It exists in machines where a lot of moving parts against each other. Even in simple machines, there are always some friction. A pulley rubs on its axle, wheels rub against chains, belts and other wheels.
Published by Jessie Agudo 56 months ago in Physics | +2 votes | 0 comments
Consider a ball sliding down a very smooth, frictionless inclined plane. Due to a constant force action in the ball, it's velocity increases as it moves along the plane. The velocity of an object is continuously changing either in its magnitude or in its direction or in both. We defined acceleration as the time rate of change or velocity or Acceleration is equal to Change in Velocity divided by the Elapsed Time.
Published by Jessie Agudo 57 months ago in Physics | +0 votes | 0 comments
An object in motion is said to be accelerated when it's velocity increases in magnitude or direction or in both. Examples of accelerated motion are falling objects and ball rolling down an incline plane. The velocity of a body may be changed by changing the speed, the direction, or both speed and direction. If the direction of the acceleration is parallel to the direction of motion, only the speed changes; if the acceleration is at right angles to the direction of motion, only the direction chan...
Published by Jessie Agudo 57 months ago in Physics | +0 votes | 0 comments
Forces affect objects in many ways. These can be categorized into two: Change in shape and change in motion. In fact, forces cannot be seen but can only be inferred through the effects that they manifest. One of the most thrilling experiences you can get from riding a roller coaster is momentarily upside down, without falling out.
Published by Jessie Agudo 57 months ago in Physics | +0 votes | 0 comments
Every object will have a mass and the point where the mass is concentrated is called the center of mass. As already pointed out a body or an object also exerts a force on the earth called gravity. The center of gravity is an imaginary point in a body or object where the mass is supposed to be concentrated.
Published by Madan G Singh 233 months ago in Physics | +0 votes | 0 comments
Multiple universe and alternate reality
Published by Pradip 90 months ago in Physics | +2 votes | 0 comments
What is Antimatter? A simple discussion of what is matter and antimatter as well as well as potential uses in harvesting antimatter.
Published by Rachel K. 94 months ago in Physics | +3 votes | 2 comments
A brief explication of Matter and Anti-matter. What is Anti-matter and its implications.
Published by Jerrod Nazarian 94 months ago in Physics | +6 votes | 2 comments
The Man of Speed, Ernst Mach and the Mach Number
Published by deepblue 95 months ago in Physics | +14 votes | 6 comments
E=MC² is an expression widely known but little understood by most who quote this expression. Interestingly, this is an algebraic expression that opened the world to things as good as nuclear energy and things as awful as nuclear bomb.
Published by Dr. Johnson C Philip 97 months ago in Physics | +29 votes | 24 comments
Today everyone knows that electrons and protons are constituents of atom, but what exactly is an electron. How exactly did they discover it?
Published by Dr. Johnson C Philip 97 months ago in Physics | +15 votes | 16 comments
A discussion of one philosopherÂ’s painful explanation of the process we label as time.
Published by Nora K Anthony 97 months ago in Physics | +2 votes | 2 comments
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