case study questions on work and energy class 9

CBSE Case Study Questions Class 9 Science - Work and Energy. (1) Work done by force acting on an object is equal to the magnitude of the force multiplied by the distance moved in the direction of the force. Work has only magnitude and no direction. Work done is negative when the force acts opposite to the direction of displacement.

Work and Energy Case Study Questions With Answers. Here, we have provided case-based/passage-based questions for Class 9 Science Chapter 11 Work and Energy. Case Study/Passage-Based Questions. Case Study 1: The figure shows a watch glass embedded in clay. A tiny spherical ball is placed at edge B at a height h above the center A.

Case Study Questions for Class 9 Science Chapter 11 Work and Energy. In CBSE Class 9 Science Paper, Students will have to answer some questions based on Assertion and Reason. There will be a few questions based on case studies and passage based as well. In that, a paragraph will be given, and then questions based on it will be asked.

Answers. <. Work and Energy Case Study Questions With Answer Key Answer Keys. Case Study. (i) (a) 0.05 J. The work done in raising the bob through a height of 5 cm (against the gravitational attraction) gets stored in the bob in the form of its potential energy. PE = mgh. = 0.1 x 10 x 5 x 10-2. = 0.05 J.

Case Study Questions On Work And Energy | Class 9 Physics | Class 9 Science Chapter 11.Topic covered in this video is-(1) - Case Study Questions On Work And ...

Top 5 case based questions from work & Energy | CBSE Class 9 Physics ️ ⏮️ Subscribe to Vedantu 9 Channel to get Daily LIVE Classes Notifications👉 https://w...

The extra and important questions for Class 9 Chapter 11 Science - Work and Energy engage in a concept-focused discussion, encompassing all chapter themes. This question-and-answer method proves time-saving during exam prep, offering an efficient way to revise the chapter and enhance understanding.

Preparing for Term 2 Exam? In this session, Shiv Sir is taking Case Based Questions/ MCQ from Work Energy and Power Chapter - CBSE Class 9 Science Chapter 11...

Important Questions for CBSE Class 9 Science Chapter 11 - Energy and work is the best resource used by students to prepare well and ace the exams. Chapter 11 Energy and Work is a very crucial chapter and all the students who master all the complex concepts of this chapter will find it easy to crack the Class 9 Science exam. The CBSE Class 9 ...

Work and Energy - Competency Based Questions. Select the number of questions for the test: 5. 10. Strengthen your understanding of Work and Energy in CBSE Class 9 Physics through competency based questions. Acquire in-depth knowledge and improve problem-solving abilities with comprehensive solutions.

As the object touches the ground, all its potential energy becomes kinetic energy. When the object hits the ground, all its kinetic energy gets converted into heat energy and sound energy. Solutions of Chapter 10 Work and Energy NCERT Science Class 9. Meticulously crafted NCERT solutions to boost your CBSE board exam preparation.

Work, Power And Energy Class 9 Extra Questions Very Short Answer Questions. Question 1. List two conditions which need to be satisfied for the work to be done on an object. Answer: W = Fs. Work is done when. (a) a force acts on an object. (b) object is displaced. Question 2.

11.1 Work. The NCERT solutions for class 9 science chapter 11 involve brief explanations of work and energy. They offer insights into the very concept of work and how 'work' is defined in our everyday life. Discover some prime examples through the below-mentioned sub-topics to know more about work.

Key Features of NCERT Solutions for Class 9 Science Chapter 11: Work and Energy. Provides detailed explanations for all complex topics. Provides completely solved solutions to all the questions in the Class 9 Science NCERT textbooks. These solutions include important questions at the end of every chapter.

Calculate the work done by him on the luggage. Answer: (a) (i) Force should be applied. (ii) Body should move in the line of action of force. (iii) Angle between force and displacement should not be 90°. (b) Mass of luggage, m = 15 kg and displacement, s = 1.5 m. Work done, W = F×s = mg × s = 15 × 10 × 1.5 = 225 J.

Answer: Battery converts chemical energy into electrical energy. This electrical energy is further converted into light and heat energy. Question 4: Certain force acting on a 20 kg mass changes its velocity from 5 m s -1 to 2 m s -1. Calculate the work done by the force. Answer: Mass of the body = 20 kg.

(f) Food grains do not move in the presence of solar energy. Hence, the work done is zero during the process of food grains getting dried in the Sun. (g)Wind energy applies a force on the sailboat to push it in the forward direction. Therefore, there is a displacement in the boat in the direction of force. Hence, work is done by wind on the boat.

Topics and Sub Topics in Class 9 Science Chapter 11 Work Power and Energy: These solutions are part of NCERT Solutions for Class 9 Science. Here we have given Class 9 NCERT Science Textbook Solutions for Chapter 11 Work Power and Energy. Q1: A force of 7 N acts on an object. The displacement is, say 8 m, in the direction of the force.

Answer. The expression is KE = 1/2 mv 2, where 'm' is the mass and V is the velocity of the body. Question.25 Define 1 watt of power. Answer. When a work of 1 joule is done in 1s, the power is said to be one watt. Question.26 A lamp consumes 1000 J of electrical energy in 10 s.

Write an expression for the kinetic energy of an object. Answer. If a body of mass mis moving with a velocity v, then its kinetic energy E k is given by the expression, E k = 1/2 mv2. Its SI unit is Joule (J). 3. The kinetic energy of an object of mass, m moving with a velocity of 5 m s−1 is 25 J.

Solutions of Test: Work and Energy- Case Based Type Questions- 1 questions in English are available as part of our course for Class 9 & Test: Work and Energy- Case Based Type Questions- 1 solutions in Hindi for Class 9 course. Download more important topics, notes, lectures and mock test series for Class 9 Exam by signing up for free.

Here we are providing assertion reason questions for class 9 science. This article covers assertion reason questions based on Class 9 Science Chapter 11 Work and Energy. To check the answer, click on 'answer' given below each question. After clicking it will expand. Assertion and Reason Questions for Class 9 Science Chapter 11 Work and Energy … Continue reading Assertion and Reason ...

Class 9 Science Chapter 11Work and Energy NCERT Solutions. Question Answers, Page 148. 1. A force of 7 N acts on an object. The displacement is, say 8 m, in the direction of the force (Fig. 11.3). Let us take it that the force acts on the object through the displacement. What is the work done in this case? W= F × S. W = 7 × 8 = 56 Nm = 56 J.