Category: Pure Sciences

Our Galaxy (Milky way / Akashganga)

Post author By Hemant More
Post date March 25, 2020
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Science > Physics > Astronomical Physics > Our Galaxy The stars, the planets, the moon and many other objects in the sky are called celestial or heavenly bodies. The universe includes everything that exists. The branch of science that deals with the study of the universe is called astronomy. The Big Bang Theory is the […]

Physics

Scalar Product And Vector Product

Post author By Hemant More
Post date March 19, 2020
9 Comments on Scalar Product And Vector Product

Science > Physics > Scalars and Vectors > Scalar Product And Vector Product In this article, we shall study two types of products of vectors: a) Scalar product and b) Vector product Scalar Product of Two Vectors: The scalar or dot product of two vectors is defined as the product of magnitudes of the two […]

Tags Area of parallelogram, Area of triangle, Cross product of vectors, Dot product of vectors, Moment of force, Power, Scalar product of vectors, Vector product of vectors, Work done

Physics

Vector Algebra

Science > Physics > Scalars and Vectors > Vector Algebra Resultant of Vectors: A resultant vector is defined as a single vector whose effect is the same as the combined effect of two or more vectors. Notes: The two vectors to be added should have the same nature. i.e. force can be added to force and […]

Physics

Scalars and Vectors

Science > Physics > Scalars and Vectors > Scalars and Vectors In this article, we shall study scalars and vectors, their characteristics. Scalar Quantities or Scalars: The physical quantities which have magnitude only and which can be specified by a number and unit only are called scalar quantities or scalars. For e.g. when we are […]

Tags Collinear vector, Coplanar vectors, Equal vectors, Equality of vectors, Free vector, Like vectors, Localized vector, Null vector, Polar vectors, Position vector, Reciprocal vector, Scalar quantities, Scalars, Tensors, Unit vector, Unlike vectors, Vector quantities, Vectors, Zero vector

Physics

The Concept of Electric Field

Post author By Hemant More
Post date March 17, 2020
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Science > Physics > Electrostatics > The Concept of Electric Field When a charge is kept in a medium it sets around it, what is called an electric field. It can be represented by drawing what is called lines of force. If another charge is brought into this region it experiences a force. Due to the field, the […]

Physics

Applications of Kinetic and Static Friction

Post author By Hemant More
Post date March 17, 2020
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Science > Physics > Friction > Applications of Friction In this article, we shall understand why does kinetic friction is smaller than the static friction and why it is easier to roll than solid. We shall also study some everyday examples in which friction is used. To produce relative motion between two bodies in contact […]

Tags Ball bearings, Bearings, Coefficient of dynamic friction, Coefficient of static friction, Dynamic friction, Friction, Frictional force, Kinetic friction, Laws of kinetic friction, Laws of static friction, Lubrication, Need of lubrication, Origin of friction, Rolling friction, Self adjusting force, Sliding friction, Static friction, Threads on tyres

Physics

Friction

Science > Physics > Friction > Concept of Friction Friction or force of friction is a force which comes into existence when two bodies in contact have relative motion or tending to have relative with respect to each other and oppose the motion. Characteristics of Friction: Force of friction is always opposites to the force […]

Tags Ball bearings, Bearings, Coefficient of dynamic friction, Coefficient of static friction, Dynamic friction, Friction, Frictional force, Kinetic friction, Laws of kinetic friction, Laws of static friction, Lubrication, Need of lubrication, Origin of friction, Rolling friction, Self adjusting force, Sliding friction, Static friction, Threads on tyres

Physics

Numerical Problems on Projectile Motion – 01

Post author By Hemant More
Post date March 17, 2020
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Science > Physics > Projectile Motion > Numerical Problems on Projectile Motion – 01 Example – 01: A body is projected with a velocity of 49 m/s at an angle of 30o with the horizontal. Find a) the maximum height reached by the body, b) the time of ascent, c) the time of flight, d) […]

Tags Angle of projection, Horizontal projection, Maximum height reached, Maximum range, Path of projectile, Projectile, Projectile motion, Range, range of projectile, Time of ascent, Time of descent, Time of flight, Trajectory of projectile, Velocity of projection

Physics

Projectile Motion

Science > Physics > Projectile Motion > Analytical Treatment of Projectile Motion When a body is thrown making an acute angle with the horizontal, the body is said to perform the projectile motion. The path of the body performing projectile motion is called a trajectory. Example: A ball thrown by a fielder to the wicketkeeper, […]

Tags Angle of projection, Horizontal projection, Maximum height reached, Maximum range, Path of projectile, Projectile, Projectile motion, Range, range of projectile, Time of ascent, Time of descent, Time of flight, Trajectory of projectile, Velocity of projection

Physics

Newton’s Equations of Motion

Post author By Hemant More
Post date March 16, 2020
17 Comments on Newton’s Equations of Motion

Science > Physics > Motion in a Straight Line > Newton’s Equations of Motion In this article, we shall study to solve problems based on Newton’s equations of motion. First Equation of Motion: Let u = initial velocity of a body, v = final velocity of the body t = time in which the change in velocity takes […]