Work and Energy

11 solved questions from Class 9 Science, each with the full working. Tap any question to see the step-by-step solution.

• 1 What is the fundamental scientific concept introduced in the chapter 'Work and Energy'? medium MCQ Key Concept & Definition
• 2 Which of the following is an important application or observation related to 'Work and Energy'? easy MCQ Practical Application
• 3 What primary question does the chapter 'Work and Energy' aim to answer? medium MCQ Core Scientific Inquiry
• 4 Why is the study of 'Work and Energy' essential for students in class-9? hard MCQ Importance & Significance
• 5 Which key practice is recommended while studying topics in 'Work and Energy'? medium MCQ Scientific Method
• 6 What is the primary topic or theoretical principle explored in 'Work and Energy' (Class 9 SCIENCE)? medium MCQ Chapter Core Principle
• 7 Which key mechanism or analytical rule is highlighted in 'Work and Energy'? medium MCQ Key Analytical Mechanism
• 8 A force of 5 N acts on a body, moving it 2 m in the direction of the force. What is the work done by the force? easy 1 mark Work done by a constant force
• 9 A 10 kg block is raised to a height of 3 m in 6 s against gravity. What is the power delivered by the worker? medium MCQ 2 marks Power of a force
• 10 A force of 50 N acts horizontally on a block. The block slides 4 m in the direction of the force. What is the work done by the force? easy 1 mark Work done by a constant force
• 11 A 15‑kg cart is pulled uphill by a horizontal force that increases linearly from 10 N at the bottom to 20 N at the top over a distance of 12 m. The hill makes a 30° angle with the horizontal. What is the work done by the pulling force? hard MCQ 3 marks Work done by a variable force on an incline