Class 9 Exam > Class 9 Notes > Extra Documents & Tests for Class 9 > Solution of Gravitation (Page No - 126) - Physics by Lakhmir Singh, Class 9
Solution of Gravitation (Page No - 126) - Physics by Lakhmir Singh, Class 9 | Extra Documents & Tests for Class 9 PDF Download
Question 59:
(a) What are
(b) State Archimedes’ principle.
(c) When does an object float or sink when placed on the surface of a
Solution :
(a) Those substances which can flow easily are called fluids. All the liquid and gases are fluids, like water, air etc.
(b) Archimedes’ Principle :
When an object is wholly (or partially) immersed in a liquid, it experiences a buoyant force (or upthrust) which is equal to the weight of liquid displaced by the object.
(c) If the buoyant force exerted by the liquid is less than the weight of the object, the object will sink in the liquid. If the buoyant force exerted by the liquid is equal to or greater than the weight of the object, the object will float in the liquid.
Question 60:
(a) How does a boat float in
(b) A piece of steel has a volume of 12 cm3, and a mass of 96 g. What is its density :
(i)
(ii) in kg/
Solution :
(a) A floating boat displaces water equal to its own weight. This displaced water exerts buoyant force to balance the weight of
(b) (i) Mass = 96 g
Volume = 12cm3
Question 61:
An elephant weighing 40,000 N stands on one foot of area 1000 cm2 whereas a girl weighing 400 N is standing on one ‘stiletto’ heel of area 1 cm2.
(a) Which of the two, elephant or girl, exerts a larger force on the ground and by how
(b) What pressure is exerted on the ground by the elephant standing on one
(c) What pressure is exerted on the ground by the girl standing on one
(d) Which of the two exerts larger pressure on the
(e) What is the ratio of pressure exerted by the girl to the pressure exerted by the
Solution :
Weight of elephant=40000N
Area of one foot =1000 cm2= 1000 x 10-4m2
Weight of girl=400N
Area of heel of girl =1 cm2=1 x 10-4m2
(a) Elephant has a larger weight of 40000N, therefore, elephant exerts a larger force on the ground. Elephant exerts a larger force on the ground by 40000N – 400 N=39600N.
(b)Weight of elephant = 40000N
Area of one foot =1000cm2= 1000 x 10-4m2
The pressure exerted by
The document Solution of Gravitation (Page No - 126) - Physics by Lakhmir Singh, Class 9 | Extra Documents & Tests for Class 9 is a part of the Class 9 Course Extra Documents & Tests for Class 9.
All you need of Class 9 at this link: Class 9
|
1 videos|228 docs|21 tests
|
FAQs on Solution of Gravitation (Page No - 126) - Physics by Lakhmir Singh, Class 9 - Extra Documents & Tests for Class 9
| 1. What is the formula for gravitational force between two objects? |  |
Ans. The formula for gravitational force between two objects is given by Newton's law of universal gravitation, which states that the force is directly proportional to the product of the masses of the objects and inversely proportional to the square of the distance between their centers. Mathematically, it can be expressed as F = G * (m1 * m2) / (r^2), where F is the gravitational force, G is the gravitational constant, m1 and m2 are the masses of the objects, and r is the distance between their centers.
| 2. How does the mass of an object affect the gravitational force acting on it? | |
Ans. The mass of an object directly affects the gravitational force acting on it. According to Newton's law of universal gravitation, the gravitational force is directly proportional to the product of the masses of the objects. This means that as the mass of an object increases, the gravitational force acting on it also increases. Therefore, a larger mass will experience a stronger gravitational force compared to a smaller mass.
| 3. What is the difference between mass and weight? | |
Ans. Mass and weight are two different physical quantities. Mass is the amount of matter present in an object and is a scalar quantity. It is constant and does not change with location. On the other hand, weight is the force with which an object is attracted towards the center of the Earth due to gravity. It is a vector quantity and can vary depending on the location. Weight is directly proportional to the mass of the object and the acceleration due to gravity.
| 4. How does the distance between two objects affect the gravitational force between them? | |
Ans. According to Newton's law of universal gravitation, the gravitational force between two objects is inversely proportional to the square of the distance between their centers. This means that as the distance between two objects increases, the gravitational force between them decreases. Similarly, if the distance decreases, the gravitational force increases. Thus, the distance between two objects has a significant impact on the magnitude of the gravitational force between them.
| 5. What is the value of the gravitational constant? | |
Ans. The value of the gravitational constant, denoted by G, is approximately 6.67430 × 10^-11 Nm^2/kg^2. It is a fundamental constant in physics and plays a crucial role in determining the strength of the gravitational force between two objects. The value of G is constant and does not change. It is used in the formula for gravitational force to calculate the magnitude of the force between two objects based on their masses and the distance between them.
Related Exams
About this Document
|
4.83/5 Rating |
|
Dec 23, 2024 Last updated |
Document Description: Solution of Gravitation (Page No - 126) - Physics by Lakhmir Singh, Class 9 for Class 9 2024 is part of Extra Documents & Tests for Class 9 preparation.
The notes and questions for Solution of Gravitation (Page No - 126) - Physics by Lakhmir Singh, Class 9 have been prepared according to the Class 9 exam syllabus. Information about Solution of Gravitation (Page No - 126) - Physics by Lakhmir Singh, Class 9 covers topics
like and Solution of Gravitation (Page No - 126) - Physics by Lakhmir Singh, Class 9 Example, for Class 9 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for Solution of Gravitation (Page No - 126) - Physics by Lakhmir Singh, Class 9.
Introduction of Solution of Gravitation (Page No - 126) - Physics by Lakhmir Singh, Class 9 in English is available as part of our Extra Documents & Tests for Class 9
for Class 9 & Solution of Gravitation (Page No - 126) - Physics by Lakhmir Singh, Class 9 in Hindi for Extra Documents & Tests for Class 9 course.
Download more important topics related with notes, lectures and mock test series for Class 9
Exam by signing up for free. Class 9: Solution of Gravitation (Page No - 126) - Physics by Lakhmir Singh, Class 9 | Extra Documents & Tests for Class 9
Description
Full syllabus notes, lecture & questions for Solution of Gravitation (Page No - 126) - Physics by Lakhmir Singh, Class 9 | Extra Documents & Tests for Class 9 - Class 9 | Plus excerises question with solution to help you revise complete syllabus for Extra Documents & Tests for Class 9 | Best notes, free PDF download
Information about Solution of Gravitation (Page No - 126) - Physics by Lakhmir Singh, Class 9
In this doc you can find the meaning of Solution of Gravitation (Page No - 126) - Physics by Lakhmir Singh, Class 9 defined & explained in the simplest way possible. Besides explaining types of
Solution of Gravitation (Page No - 126) - Physics by Lakhmir Singh, Class 9 theory, EduRev gives you an ample number of questions to practice Solution of Gravitation (Page No - 126) - Physics by Lakhmir Singh, Class 9 tests, examples and also practice Class 9
tests
|
Explore Courses for Class 9 exam
|
|
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
Related Searches
Class 9 | Extra Documents & Tests for Class 9
,Objective type Questions
,study material
,Class 9 | Extra Documents & Tests for Class 9
,mock tests for examination
,practice quizzes
,Extra Questions
,Important questions
,shortcuts and tricks
,Solution of Gravitation (Page No - 126) - Physics by Lakhmir Singh
,Solution of Gravitation (Page No - 126) - Physics by Lakhmir Singh
,Sample Paper
,ppt
,Previous Year Questions with Solutions
,Summary
,past year papers
,Semester Notes
,Viva Questions
,Free
,Exam
,video lectures
,Solution of Gravitation (Page No - 126) - Physics by Lakhmir Singh
,Class 9 | Extra Documents & Tests for Class 9
,MCQs
;
Additional Information about Solution of Gravitation (Page No - 126) - Physics by Lakhmir Singh, Class 9 for Class 9 Preparation
Solution of Gravitation (Page No - 126) - Physics by Lakhmir Singh, Class 9 Free PDF Download
The Solution of Gravitation (Page No - 126) - Physics by Lakhmir Singh, Class 9 is an invaluable resource that delves deep into the core of the Class 9 exam.
These study notes are curated by experts and cover all the essential topics and concepts, making your preparation more efficient and effective.
With the help of these notes, you can grasp complex subjects quickly, revise important points easily,
and reinforce your understanding of key concepts. The study notes are presented in a concise and easy-to-understand manner,
allowing you to optimize your learning process. Whether you're looking for best-recommended books, sample papers, study material,
or toppers' notes, this PDF has got you covered. Download the Solution of Gravitation (Page No - 126) - Physics by Lakhmir Singh, Class 9 now and kickstart your journey towards success in the Class 9 exam.
Importance of Solution of Gravitation (Page No - 126) - Physics by Lakhmir Singh, Class 9
The importance of Solution of Gravitation (Page No - 126) - Physics by Lakhmir Singh, Class 9 cannot be overstated, especially for Class 9 aspirants.
This document holds the key to success in the Class 9 exam.
It offers a detailed understanding of the concept, providing invaluable insights into the topic.
By knowing the concepts well in advance, students can plan their preparation effectively.
Utilize this indispensable guide for a well-rounded preparation and achieve your desired results.
Solution of Gravitation (Page No - 126) - Physics by Lakhmir Singh, Class 9 Notes
Solution of Gravitation (Page No - 126) - Physics by Lakhmir Singh, Class 9 Notes offer in-depth insights into the specific topic to help you master it with ease.
This comprehensive document covers all aspects related to Solution of Gravitation (Page No - 126) - Physics by Lakhmir Singh, Class 9.
It includes detailed information about the exam syllabus, recommended books, and study materials for a well-rounded preparation.
Practice papers and question papers enable you to assess your progress effectively.
Additionally, the paper analysis provides valuable tips for tackling the exam strategically.
Access to Toppers' notes gives you an edge in understanding complex concepts.
Whether you're a beginner or aiming for advanced proficiency, Solution of Gravitation (Page No - 126) - Physics by Lakhmir Singh, Class 9 Notes on EduRev are your ultimate resource for success.
Solution of Gravitation (Page No - 126) - Physics by Lakhmir Singh, Class 9 Class 9 Questions
The "Solution of Gravitation (Page No - 126) - Physics by Lakhmir Singh, Class 9 Class 9 Questions" guide is a valuable resource for all aspiring students preparing for the
Class 9 exam. It focuses on providing a wide range of practice questions to help students gauge
their understanding of the exam topics. These questions cover the entire syllabus, ensuring comprehensive preparation.
The guide includes previous years' question papers for students to familiarize themselves with the exam's format and difficulty level.
Additionally, it offers subject-specific question banks, allowing students to focus on weak areas and improve their performance.
Study Solution of Gravitation (Page No - 126) - Physics by Lakhmir Singh, Class 9 on the App
Students of Class 9 can study Solution of Gravitation (Page No - 126) - Physics by Lakhmir Singh, Class 9 alongwith tests & analysis from the EduRev app,
which will help them while preparing for their exam. Apart from the Solution of Gravitation (Page No - 126) - Physics by Lakhmir Singh, Class 9,
students can also utilize the EduRev App for other study materials such as previous year question papers, syllabus, important questions, etc.
The EduRev App will make your learning easier as you can access it from anywhere you want.
The content of Solution of Gravitation (Page No - 126) - Physics by Lakhmir Singh, Class 9 is prepared as per the latest Class 9 syllabus.
|
© EduRev
|
Education Revolution
|
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup