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Class 9 Science Solutions English Medium
Download latest NCERT Solutions for Class 9 based on CBSE 2026-27 syllabus. Get chapter-wise detailed explanations, step-by-step answers, important questions and exam-ready study material in Hindi and English medium.
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Class 9 Science Solutions English Medium
NCERT Solutions for Class 9 are specially prepared according to the latest CBSE syllabus (2026-27) to help students understand every concept clearly. These solutions provide step-by-step explanations, accurate answers, and exam-oriented guidance for all chapters. Class 9 students can improve their problem-solving skills, strengthen conceptual understanding, and prepare confidently for school as well as board examinations. All questions are solved in a simple and easy-to-understand language for both Hindi and English medium learners.
Class 9 Science Solutions English Medium
NCERT Solutions Class 9 Science English Medium
11. Work and Energy
Topic: Magnitude of Work
Positive force and Negative force:
When we lift an object, the force we exert on the object will be considered positive. At the same time, there is another force working there which is called the force of gravity. The force of gravity works opposite to the force applied by us, so this force will be considered negative.
Since when we apply force on an object, we have to exert more force than the result of the force of gravity to displace the object, hence the resultant force becomes positive. For example, suppose we applied 20 N force to lift an object while the measure of gravity is 10 N there.
Resultant force = 20 - 10 = 10 N
In this situation, we applied a total of 10 N force to displace the object.
Example1: A person displaces a stone by 3 meters by applying 100 Newton force. So find out the work done by him.
solution:
Force applied here (F) = 100 N
Displacement (s) = 3 m
Work done (W) = F × s
= 100 × 3 = 300 joules
Example 2: A boy is unable to move a table by applying 20 N force and gets tired. So calculate the work done by him.
solution:
Force applied here (F) = 20 N
Displacement (s) = 0 m
Work done (W) = F × s
= 20 × 0 = 0 joules
The work done here is zero. Therefore, this work will not be considered.
Example 3: Suppose you lifted a heavy burden with force and placed it on your head. Displacement occurred in the load. Till this work was done, but if you keep this burden on your head and stand for a long time. So force is being felt by you, gravity is also working opposite to it, but there is no displacement in the object. Therefore, in this situation no work will be considered here.
Example 4: A porter carries a 25 kg load on his head 2 meters above. So calculate the work done by him on that burden.
solution :
Mass of burden m = 25 kg
Displacement = 2 m and
Force on object F = mg = 25 kg × 10 m s-2
= 250 kg / m s-2 or 250 N
Work on burden (W) = F × s
= 250 × 2 N m
= 500 N m = 500 J
1 joule work: When an object is displaced 1 meter in the direction of force by applying 1 N force, it will be said that 1 joule work has been done.
NCERT Solutions Class 9 Hindi and English Medium – Complete Study Material
NCERT Solutions Class 9 students ke liye specially CBSE latest syllabus (2026-27) ke according prepare kiye gaye hain. Yeh solutions Hindi aur English medium dono ke liye available hain, jisse har student apni language preference ke hisaab se padh sakta hai. Har chapter ke sabhi prashnon ke step-by-step answers diye gaye hain jo concept clarity aur exam preparation me madad karte hain.
Chapter-Wise Detailed Explanations
Class 9 ke liye diye gaye Chapter Wise NCERT Solutions me har question ka detailed aur easy explanation diya gaya hai. Chahe aap CBSE Board Exam Preparation kar rahe ho ya school test ke liye revise kar rahe ho, yeh solutions aapko complete understanding denge. Har answer simple language me likha gaya hai jisse students concepts ko easily grasp kar saken.
Hindi and English Medium Support
Students Hindi aur English medium dono me NCERT Book Solutions Class 9 access kar sakte hain. Yeh dual language support un students ke liye helpful hai jo apni regional language me better samajhna chahte hain. Sabhi answers CBSE Latest Syllabus 2026-27 ke anusaar update kiye gaye hain.
Important Features of NCERT Solutions
- Class 9 NCERT Solutions PDF
- CBSE Class 9 Study Material
- NCERT Book Questions and Answers
- Exam Oriented Important Questions
- Step-by-Step Detailed Solutions
- Concept Clarity and Revision Notes
Why Students Should Use NCERT Solutions?
Aaj ke competitive environment me sirf textbook padhna kaafi nahi hota. NCERT Solutions for Class 9 students ko practice aur conceptual understanding dono provide karte hain. Yeh solutions unhe exam pattern samajhne, frequently asked questions practice karne aur high score achieve karne me madad karte hain. Regular practice se students apne weak topics ko improve kar sakte hain.
Best Resource for Exam Preparation
Agar aap Class 9 CBSE Preparation ke liye ek trusted aur reliable source dhundh rahe hain, to yeh NCERT Solutions perfect choice hain. Yeh study material school exams, unit tests, half-yearly aur annual exams ke liye equally useful hai. Har chapter ke answers accurate, verified aur student-friendly format me diye gaye hain.
Isliye agar aap NCERT Solutions Class 9 Hindi and English Medium search kar rahe hain, to yahan aapko complete chapter-wise solutions milenge jo aapki academic journey ko strong aur confident banayenge.