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Things to remember
1) Law of conservation of Momentum. The total momentum for the isolated remains constant
2) Elastic collision: In this collison, Momentum and Kinetic energy of the system remains conserved
3) Inelastic collision: In this collision ,Momentum is conserved only
Central Board of Secondary Education, Delhi has been conducting CBSE group Mathematics Olympiad for students studying in its affiliated schools.
WHO CAN PARTICIPATE IN CBSE GROUP MATHEMATICAL OLYMPIAD
a) Student of class XII, XI, X or IX can participate in the competition. However, there will be a common question paper for all participants. Bright students from class VIII may also appear.
b) A school can sponsor maximum five students for the competition.
One question has always fascinated the scientists ” When the universe began?” . Current Thinking believes that Universe began as a singularity in space and Time. The singularity is called as Big Bang. It is believed at this time everything was condensed into very small space. After that the Universe has been continuously expansion mode.
A Astronomer Edwin Hubble discovered in 1929 the rate of expansion of Universe i.e the rate at which the galaxies are receding from each other. That law is called Hubble Law. As per Law, if the two galaxies are at distance R,Their present relative velocity of separation is given by
Scope of the Problem:
Generally the problem asks about forces or accelerations
How to attack at the Problem
1) Draw one free body diagram for each object in problem
Read the following two post to get the feel about free body diagram
Different Type of Force and There Origin
How To draw Free Body diagram
Read the below Video for Free body diagram also
The Atwood machine (or Atwood’s machine) was invented in 1784 by Rev. George Atwood as a laboratory experiment to verify the mechanical laws of motion with constant acceleration. Atwood’s machine is a common classroom demonstration used to illustrate principles of classical mechanics.
The ideal Atwood Machine consists of two objects of mass m1 and m2, connected by an inextensible massless string over an ideal massless pulley.
1. Find a place where you go only to study. It should be quiet area .Identify your distractions. Find ways to decrease them or to postpone them until study breaks e.g., taking the phone off the hook, turning off Whatapps. If using a computer, exit out of email and messengers.
2. Always sit straight in a chair at a desk, start out with questions about the material, outline chapters, underline key phrases after reading section, write notes in margins, ask yourself what you have learned.Take good notes of the chapter and revise them also.If you have difficulty understanding any thing ,search it in other books and internet. If it is not resolved,write it down to discuss with Friends and teacher
3) Doing a big task may seems to be impossible to you. So Divide your work into smaller manageable tasks that can be completed in a short period of time. First Push yourself to complete one small task, then move on to the next task. Focus on one small task at a time.
Best books for JEE maths
Central Board of Secondary Education’s (CBSE) has taken new initiative on Online Labs-Virtual Experiments (OLabs), students would now be able to perform science experiments virtually and also many theoretical concepts in sciences in a better manner.
Online Labs for School Experiments (OLabs) is a novel e-Learning project developed by CDAC,Mumbai and Amrita University, Kerala and based on the concept of virtual learning environment.OLabs works on web environment and provides experience in online practical science experiments.
