Centre of Mass Centre of mass of a system is the point that behaves as whole mass of the system is concentrated at it and all external forces are acting on it. For rigid bodies, centre of mass is independent of the state of the body i.e.,...

Work When a force acts on an object and the object actually moves in the direction of force, then the work is said to be done by the force. Work done by the force is equal to the product of the force and the displacement of the object in the...

Inertia The property of an object by virtue of which it cannot change its state of rest or of uniform motion along a straight line its own, is called inertia. Inertia is a measure of mass of a body. Greater the mass of a body greater will...

Projectile Motion When any object is thrown from horizontal at an angle θ except 90°, then the path followed by it is called trajectory, the object is called projectile and its motion is called projectile motion. If any object...

Motion If an object changes its position with respect to its surroundings with time, then it is called in motion. Rest If an object does not change its position with respect to its surroundings with time, then it is called at rest. [Rest...

Those physical quantities which require magnitude as well as direction for their complete representation and follows vector laws are called vectors. Vector can be divided into two types 1. Polar Vectors These are those vectors which...

Units. A definite amount of a physical quantity is taken as its standard unit. The standard unit should be easily reproducible, internationally accepted. Fundamental Units Those physical quantities which are independent to each other...

Some Basic Concepts of Chemistry Class 11 Notes Chapter 1 - NCERT, NIOS, CBSE & BSEB • Importance of Chemistry Chemistry has a direct impact on our life and has wide range of applications in different fields. These are given below: (A)...

NIOS - Tutor Marked Assignments - Secondary Course 2019–2020 1. Hindi (201) - 16/12/2019 2. English (202) - 17/12/2019 3. Mathematics (211) - 18/12/2019 4. Science & Technology (212) - 19/12/2019 5. Social Science (213) -...

NIOS - Tutor Marked Assignments - Senior Secondary Course 2019–2020 1. Hindi (301) - 16/12/2019 2. English (302) - 23/12/2019 3. Mathematics (311) - 18/12/2019 4. Physics (312) - 19/12/2019 5. Chemistry (313) - 20/12/2019 6. Biology...