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Mechanics

Atmospheric pressure at sea level:Definition,formula & applications

Atmospheric Pressure The Earth is surrounded by a cover of air called atmosphere. It extends to a few hundred kilometers above sea level. Just as certain sea creatures live at the bottom of ocean, we live at the bottom of a huge ocean of air. Air is a mixture of gases. The density of air in the atmosphere is not ...

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Pascal’s principle (law): formula,applications & examples in real life

What is Pascal’s Law and how do we use it? An external force applied on the surface of a liquid increases the liquid pressure at the surface of the liquid. This increase in liquid pressure in transmitted equally in all directions and to the walls of the container in which it is filled. This result is called Pascal’s law which ...

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What is the difference between average and instantaneous velocity?

Instantaneous velocity: “If a body covers small displacement in in small interval of time than its velocity will be instantaneous velocity such that Δt is equal to zero.”Where Δt is the small interval of time.Average velocity does not tell us about the motion between two points on the path.The path may be straight or curved and the motion may be steady or ...

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What is difference between angular and tangential velocity?

Angular velocity “Time rate of change of angular displacement is known as angular velocity.”It is denoted by ω,its formula is given by: Unit of angular velocity is radian per second (rad s-1) . Very often we are interested in knowing how fast or how slow a body is rotating.It is determined by its angular velocity which is defined as the rate ...

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Difference between escape and orbital velocity law with examples

Relation between escape velocity and orbital velocity formula What is the Escape velocity ? “The velocity required by a body to escape from the earth’s gravitational field.”It is our daily life experience that  an object projected upward comes back to the ground after rising to a certain height.This is due to the force of gravity acting downward.With increased initial velocity,the ...

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law of conservation of momentum formula & examples in real life

Guess now! Why the passengers in the bus move forward when the bus stops quickly? What happens when two bodies strike with each other? Why gun recoils back after firing? Do  you want to learn this types of questions then? Let start: What is law of conservation of momentum? law of conservation of momentum states that:”The momentum of an isolated ...

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Difference between stable unstable and neutral equilibrium with examples

Types  of equilibrium in physics There are three states or types  of equilibrium in physics Stable equilibrium Unstable equilibrium Neutral equilibrium Stable equilibrium “A body is said to be in stable equilibrium if after a slight tilt it returns to its previous position.” Consider a book lying on the table.Tilt the book slightly about its one edge by lifting it ...

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difference between centre of mass and centre of gravity with examples

Centre of Mass “Centre of mass of a system is such a point where an applied force causes the system to move without rotation” It is observed that the centre of mass of a system moves as if its entire mass is confined at that point. A force applied at such a point in the body does not produce any ...

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Newton’s third law of motion examples in daily life

Newton’s first law of motion Newton’s second law of motion Newton’s third law of motion Newton’s third law of motion explains the quantitatively that how forces affect motion.But question is that where these forces come from?We noticed during observations that a force on any object always exerted by another object. For examples: A horse pulls a cart ,a person walks ...

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Newton’s second law of motion formula and examples in daily life

Newton’s first law of motion Newton’s second law of motion Newton’s Third law of motion According to newton’s first law of motion “if no net force is acting on a body at rest,then the body remains at rest,or if the body is moving will continue to move.” But! What will happen if  net force is act on a body? Newton ...

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