Evaluation of recoil velocity of the gun
CBSE Class IX science has 5 chapters of physics, among them ‘Force and laws of motion‘ is very important, in this chapter you will study Newton’s law of motion, force, momentum and conservation of momentum. Momentum is the product of mass and velocity. Although there are so many applications of conservation of momentum. One of the applications based on conservation of momentum is when a bullet is fired by a gun then gun moves in the backward direction with a velocity known as recoil velocity of the gun.
Click for online shopping
Future Study Point.Deal: Cloths, Laptops, Computers, Mobiles, Shoes etc
When a bullet is fired by the gun and gun moves in backword direction with a particular speed known as recoil velocity of the gun, it happens because the gun exerts a force to the bullet and according to third law of motion the bullet also exerts a force to the gun, the bullet gains a large momentum which causes the bullet move in the forward direction with large velocity and the same momentum is transferred to the gun, gun acquires a momentum due to which it gains a velocity which is recoil velocity of the gun. Here we are going to discuss how to evaluate the recoil velocity of the gun. After you study this post evaluation of the recoil velocity of the gun, at the end there are given few unsolved questions which you can solve easily. If you like our this post, please don’t forget to subscribe to our website and make comment.
You can also study related topics
Three Laws of Motion: Class 9 CBSE
Average Speed and Average Velocity: Differences
How to evaluate recoil velocity of gun
If energy is conserved then why do we need to save it for future generations?
What is second law of of motion ?
What is universal law of gravitational force
When a bullet is shooted by a gun then determine the recoil velocity of the gun. We can understand how to evaluate recoil Velocity of gun by the following way.
Let the mass of gun is and its recoil velocity is
the mass of the bullet is
and it is shooted by the gun with the velocity of
. Since the initialy bullet and gun both are in rest before the bullet is fired, therefore the intial velocity of gun,
and initial velocity of the bullet
.
As we know the momentum = mass × velocity, According to the conservation of momentum
Initial momentum = Final momentum
The initial velocity of the gun ×mass of the gun + Initial velocity of bullet × mass of bullet = Final velocity of the gun ×mass of the gun + Final velocity of the bullet × mass of the bullet.
The final velocity of the gun = Recoil velocity of the gun
The negative sign of velocity shows that the gun moves in the opposite direction of the bullet.
Similar questions.
From a gun of mass 4 kg. A bullet of mass 50 gm is fired with an initial velocity of 35 m/s. Calculate the recoil velocity of the gun.
Ans. Mass of gun, = 4 kg, Initial velocity of the gun,
, Mass of bullet,
= 50 gm = 0.05 kg, Initial velocity of the bullet,
, Final velocity of the gun (recoil velocity of gun),
, Final velocity of bullet ,
= –0.4375≈– 0.44
Hence the recoil velocity of the gun =– 0.44 m/s, its meaning is that after the bullet is fired, the gun moves in the backward direction with the velocity of 0.44 m/s.
You can get the help of video in understanding the solution of the question
You can solve other similar questions based on the conservation of momentum as follows.
Q1. Find the recoil velocity of a gun having a mass equal to 8 kg, if a bullet of 40 gm acquires the velocity of 500m/s after firing from the gun.
Q2.A 35 Kg boy jumps (from rest) into a moving trolley of mass 70 Kg and already moving at a velocity of 5 m/s to the right. What is the speed of the trolley after the boy has jumped in?
Study our post, how does the human eye function
Q3.5 Kg gun fires a bullet of 15 grams at a velocity of 1000 m/s to the right. What is the velocity of the recoil of the gun?
Q4.6kg ball is thrown west at 20m/s and collides with a 14kg ball while in the air. If the balls stick together in the crash and fall straight down to the ground, what was the velocity of the second ball?
Click for online shopping
Future Study Point.Deal: Cloths, Laptops, Computers, Mobiles, Shoes etc
Q5.2000kg car traveling at 25m/s rear-ends another 2000kg car at rest. The two bumpers lock and the cars move forward together. What is their final velocity?
Q6.900kg car strikes a 1000kg car at rest from behind. The bumpers lock and they move forward together. If their new final velocity is equal to 18m/s, what was the initial speed of the first car?
Q7.10kg ball moving at 30ms strikes a 12kg ball at rest. After the collision, the 10kg ball is moving with a velocity of 13m/s. What is the velocity of the second ball after the collision?
Q8.11kg ball moving at 33m/s strikes a second ball at rest. After the collision, the 11kg ball is moving with a velocity of 13m/s and the second ball is moving with a velocity of 8ms. What is the mass of the second ball?
Important Science Notes for Class 9 and 10 grade
Class 9 Physics Important Notes
What is the difference between Distance and Displacement
Difference between velocity and speed
Average Speed and Average velocity
Momentum: Definitions,units,formula and Uses in real life:Class 9 CBSE
The universal law of gravitational force
What is the difference between mass and weight
Thrust and Pressure : Difference
Archimedes Principle: Complete detail
What is the difference between Work,Energy and Power: Class 9 CBSE
CBSE IX Class Science Sample Papers
Class 9 Chemistry Important Notes
Evaporation, Vapourization, and Latent heat
How does the water kept in an earthen pot become cold during summer?
What are the factors affecting evaporation?,
What is the difference between solution, colloid, and suspension?
What is the difference between the element and the compound?
Determining Valency, Net Charge and Molecular Formula
Molar mass,molecular mass and mole concept
If energy is conserved then why do we need to save it for future generations?
Class 9 Biology Important Notes
Difference between Animal cell and Plant Cell
Difference between Smooth Endoplasmic Reticulum and Rough Endoplasmic Reticulum
Function and structure of Mitochondria
Class 9 Science Chapterwise NCERT Solutions and Important notes of Science
Structure and Function of Cell : Cell Biology
What are Chromosomes, DNA and Genes?
Types of plant tissues : Class 9 CBSE Notes
Animal Tissues : Class 9 Science CBSE
What is the green house effect?
NCERT Solutions of Science and Maths for Class 9,10,11 and 12
NCERT Solutions for class 9 maths
NCERT Solutions for class 9 science
NCERT Solutions for class 10 maths
CBSE Class 10-Question paper of maths 2021 with solutions
CBSE Class 10-Half yearly question paper of maths 2020 with solutions
CBSE Class 10 -Question paper of maths 2020 with solutions
CBSE Class 10-Question paper of maths 2019 with solutions
NCERT Solutions for Class 10 Science
NCERT Solutions for class 11 maths
| Chapter 1-Sets | Chapter 9-Sequences and Series |
| Chapter 2- Relations and functions | Chapter 10- Straight Lines |
| Chapter 3- Trigonometry | Chapter 11-Conic Sections |
| Chapter 4-Principle of mathematical induction | Chapter 12-Introduction to three Dimensional Geometry |
| Chapter 5-Complex numbers | Chapter 13- Limits and Derivatives |
| Chapter 6- Linear Inequalities | Chapter 14-Mathematical Reasoning |
| Chapter 7- Permutations and Combinations | Chapter 15- Statistics |
| Chapter 8- Binomial Theorem | Chapter 16- Probability |
CBSE Class 11-Question paper of maths 2015
CBSE Class 11 – Second unit test of maths 2021 with solutions
NCERT Solutions for Class 11 Physics
chapter 3-Motion in a Straight Line
NCERT Solutions for Class 11 Chemistry
Chapter 1-Some basic concepts of chemistry
NCERT Solutions for Class 11 Biology
NCERT solutions for class 12 maths
| Chapter 1-Relations and Functions | Chapter 9-Differential Equations |
| Chapter 2-Inverse Trigonometric Functions | Chapter 10-Vector Algebra |
| Chapter 3-Matrices | Chapter 11 – Three Dimensional Geometry |
| Chapter 4-Determinants | Chapter 12-Linear Programming |
| Chapter 5- Continuity and Differentiability | Chapter 13-Probability |
| Chapter 6- Application of Derivation | CBSE Class 12- Question paper of maths 2021 with solutions |
| Chapter 7- Integrals | |
| Chapter 8-Application of Integrals |
Class 12 Solutions of Maths Latest Sample Paper Published by CBSE for 2021-22 Term 2
Class 12 Maths Important Questions-Application of Integrals
Solutions of Class 12 Maths Question Paper of Preboard -2 Exam Term-2 CBSE Board 2021-22
Solutions of class 12 maths question paper 2021 preboard exam CBSE Solution
