Law of motion,Force,Newton's law of motion, linear momentum, impulse ,Friction

Force

Force is a push or pull which can change the position of a body as required. It is a vector quantity following all the rules of vector. Forces are of two types

1. Balanced Forces If there are many forces acting on a body, but resultant of all of them is zero, then the forces are called balanced forces.

2. Unbalanced Forces If the resultant of all the forces is not zero, then the forces are called unbalanced forces.

Newton's Law of Motion

There are three laws of motion

First Law

"Everybody remains in its state of rest or state of motion, until an external force is applied on it." This law is also known as law of Inertia Inertia is a property by virtue of which, a body tries to retain its state. Inertia are of two types

1. Inertia of Rest If a body is in rest, then it will remain in rest until an external force is applied on it.

2. Inertia of Motion If a body is in motion, then it will remain in motion until an external force is applied on it.

There are some examples of inertia in everyday life.

(i) A glass is broken into pieces when a stone strikes on it, but when a high speed bullet hits the glass it makes a clean hole.

(ii) The persons sitting in the bus falls backward when bus starts to move suddenly. (iii) An athlete runs very fast before taking high jump.

(iv) A man getting down of a moving bus falls forward.

Second Law

"The force applied on a body is equal to the product of mass of the body and the acceleration produced in it.

F = ma

and also the rate of change of linear momentum (p = mu) of a body is proportional to force applied in direction of force .

Third Law

"Every action have equal and opposite reaction." Action and reaction always act on the different bodies.

Linear Momentum

The product of mass and velocity of a body is called linear momentum. It is represented by p. its unit is kg-m/s. It is a vector quantity. p = mv

Impulse

If a force acts on a body for a very short time At, then the product of force and time is called the impulse.

Impulse = Change in momentum or Impulse

Friction

When a body slides (or has sliding tendency) or rolls over another body or on a surface, then a force opposing the motion acts between those surfaces of the body which are in contact, this force is called friction. Two basic types of friction is kinetic friction and static friction.

What is WORD WIDE WEB?

WWW {WORD WIDE WEB} World Wide Web, which is also known as a Web, is a collection of web sites or web pages stored in web servers and connected to local computers through the internet. These websites contain text pages, digital images, audios, videos, etc. Users can access the content of these sites from any part of the world over the internet using their devices such as computers, laptops, cell phones, etc. The WWW, along with internet, enables the retrieval and display of text and media to your device. The building blocks of the Web are web pages which are formatted in HTML and connected by links called "hypertext" or hyperlinks and accessed by HTTP These links are electronic connections that link related pieces of information so that users can access t thihe desired information quickly. Hypertext offers the advantage to select a word or phrase from text and thus to access other pages that provide additional information related to that word or phrase.A web page is

What is computer basic information?

What might we at any point instruct you? PC Rudiments: What is a PC? What is a PC? A PC is an electronic gadget that controls data, or information. It can store, recover, and process information. You may definitely realize that you can utilize a PC to type reports, send email, mess around, and peruse the Internet. You can likewise utilize it to alter or make accounting sheets, introductions, and even recordings.Watch the video beneath to find out about various sorts of PCs.Searching for the old rendition of this video? You can in any case see it here. Equipment versus programming Before we discuss various sorts of PCs, we should discuss two things all PCs share for all intents and purpose: equipment and programming.Equipment is any essential for your PC that has an actual design, like the console or mouse. It additionally incorporates the PC's all's inside parts, which you can find in the picture underneath.seeing equipment .Programming is any arrangement of directions that

What are life process?

WHAT ARE LIFE PROCESSES? The maintenance functions of living organisms must go on even when they are not doing anything particular. Even when we are just sitting in class even if we are just asleep, this maintenance job has to go on The processes which together perform this maintenance job an We processes . Since these maintenance processes are needed to prevent damage and break-down energy is needed for them. This energy comes from outside the body of the mdhadual organism. So there must be a process to transfer a source of energy from outside the body of the organism which we call food, to the inside, a process we commonly call nutrition If the body size of the organisins is to grow, additional raw material wit also be needed from outside. Since life on earth depends on carbon- based molecules most of these food sources are also carbon-based Depending on the complexity of these carbon sources, different organisms can then use different kinds of nutritional processes The outside sourc

Study life

Search This Blog