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# Momentum:Definition,unit,formula and Uses in real life:Class 9 CBSE

The word momentum you would have heard many times in the sports news or commentary ,as an example the cricket team  chennai super king(an IPL team)  has gained its momentum or in a day to day time if a students progress continuously then we say ,this student has got a momentum in his or her intelligence. In all these example everywhere there is a move of an individual or entity ,therefore momentum involves a move(velocity) and mass(individual or entity),scientifically we define momentum as a product of the mass and the velocity.

## Momentum: Definition,unit,formula and Uses in real life:Class 9 CBSE

Table of content

 (i) Definition of momentum (ii) Formula of momentum (iii) Unit of the momentum (iv) Conservation of the momentum (v) Application of the momentum (vi) Questions based on the momentum

### Definition of momentum:

Momentum is the product of velocity and the mass, velocity is a vector quantity and mass is the scaler quantity therefore Momentum is the vector quantity.Momentum is represented by small case English letter p or large case English letter P.

### Formula of momentum:

Formula for Momentum is as follows

P = mv

Where P is the Momentum,v is the velocity of a moving object and m is the mass of the object

### Unit of the momentum:

SI Unit of the momentum = SI unit of the mass× SI unit of the velocity

Unit of the momentum = Kilogram × Meter/Second =Kg.ms-1

### Conservation of the momentum:

The initial momentum of a system is equal to the final momentum or in other words,the net momentum of a system is zero.

Let in a system two objects colloids to each other which are of the mass m1 and m2 and are moving with velocities u1 and urespectively and after collission their velocities changes to v1 and v

Let initial

Initial momentum =Final momentum

P1 =P2

m1 u1 +m2 u2 = m1 v1 +m2 v2

Or

m1 u1 +m2 u2 – m1 v1 -m2 v2 =0

### Application of the momentum in real life

When a ball thrown by us on the wall ,it colloides with the wall with a particular velocity it is reflected back by the wall by a same velocity that follows conservation of the momentum.

A cricketer catch the ball by moving his both hands in back ward direction for maintaining the conservation of the momentum so that ball could not be bounces from his hand.

### Class 9 Physics Important Notes

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The second  law of motion

Recoil velocity of the gun

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Archimedes Principle: Complete detail

CBSE IX Class Science Sample Papers

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Evoporation,Vapourization and Latent heat

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Atom, Molecule, and Atomicity

Determining Valency, Net Charge and Molecular Formula

Mole concept

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### Class 9 Biology Important Notes

Structure and Function of Cell : Cell Biology

Difference between Animal cell and Plant Cell

Types of plant tissues : Class 9 CBSE Notes

Animal Tissues : Class 9 Science CBSE

E-books of physics,chemistry,biology ,maths and solutions of class 10 previous year’s question papers(click the link)

### Class 9 Science previous years Question papers with solutions and important questions and answers

CBSE Class 9-Question paper of science 2020 with solutions

CBSE Class 9-Sample paper of science

CBSE Class 9-Unsolved question paper of science 2019

### Click the link for NCERT Solutions for classes 9,10,11 and 12 of Maths & Science

NCERT Solutions and CBSE notes for Class 9,10,11 and 12 of Maths and Science

NCERT Solutions of Class 9 Science : Chapter 1 to Chapter 15

NCERT Solutions of Class 9 Maths : from chapter 1 to 15

NCERT Solutions Class 10 Science from chapter 1 to 16

NCERT Solutions of all chapters of Maths for Class 10 from Chapters 1 to 15

NEET Syllabus and its preparation

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## NCERT Solutions of class 9 science

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