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Calculate the work done. Ans: Work done W = F × d × cos (3 0 ∘) W = F \times d \times \cos (30^\circ). Q. 8 A body of mass 2 kg is moving with a speed of 20 m/s. Find the kinetic energy. Q. 9 A moving body of 30 kg has 60 J of KE. Calculate the speed. Q. 10 A hammer of mass 1 kg falls freely from a height of 2 m.
Introduction of Work and Energy - PowerPoint Presentation, Science, Class 9 in English is available as part of our Class 9 preparation & Work and Energy - PowerPoint Presentation, Science, Class 9 in Hindi for Class 9 courses. Download more important topics, notes, lectures and mock test series for Class 9 Exam by signing up for free.
Hence light body has greater kinetic energy. Q. An electric bulb of 60w is used for 6h per day .Calculate the units of energy consumed in one day by the bulb. p =w/t or, p =E/t. E = wt = 60w x 6h = 60w x 6 x 3600 sec = 1.3 x 10 6 J. Q. A boy of mass 50kg runs up to a stair case of 45 steps in 9s.
MCQ of Work and Energy - Science Class 9. MCQs are the questions in which students of Class 9 can gain marks or can lose marks very easily. These questions are One marks questions with given multiple choices. They need to choose the correct option. These questions are very simple just based on the basic concepts.
Document Description: Mindmap: Work and Energy for Class 9 2024 is part of Subject-Wise Mind Maps for Class 9 preparation. The notes and questions for Mindmap: Work and Energy have been prepared according to the Class 9 exam syllabus. Information about Mindmap: Work and Energy covers topics like and Mindmap: Work and Energy Example, for Class 9 ...
Document Description: NCERT Notes, Chapter 11: Work & Energy, Class 9 (Science) for Class 9 2024 is part of Class 9 preparation. The notes and questions for NCERT Notes, Chapter 11: Work & Energy, Class 9 (Science) have been prepared according to the Class 9 exam syllabus.
Q.8. Calculate the work done in lifting 200 kg of water through a vertical height of 6 m. Ans. Work done in lifting a body = Weight of body X vertical distance. The work done in lifting = W = mgh = 200 kg x 10m/s2 x6 m = 1200J. Q.9. Give one example each of potential energy (i) due to position (ii) due to shape. Ans.
Ans. In physics, work is defined as the transfer of energy that occurs when a force is applied to an object and the object is displaced in the direction of the applied force. The formula for work is W = F * d, where W is work, F is the force applied, and d is the displacement of the object. 2.
Document Description: Work and Energy - Notes for Class 9 2024 is part of Class 9 preparation. The notes and questions for Work and Energy - Notes have been prepared according to the Class 9 exam syllabus. Information about Work and Energy - Notes covers topics like and Work and Energy - Notes Example, for Class 9 2024 Exam.
Work & Energy NCERT Solutions - Class 9 PDF Download. Please wait while the PDF view is loading. Page 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.
