Class 9 Physics Unit 5 | Work Energy and Power | 5.4 | Full Numericals Solutions

Описание: Class 9 Physics Unit 5 | Work Energy and Power | Smart Syllabus 2025-26 | Full Numericals SolutionsClass 9 Physics Unit 5 Work Energy and Power complete explanation and solved numericals according to the Smart Syllabus 2025-2026. This video covers Work, Energy, Power, types of energy, work-energy principle, and all important formula-based questions for Punjab Boards. Best for board exam preparation, smart syllabus learning, and complete concept clarity for matric students.

Topics include:
• Work and its formula
• Energy types and conversions
• Power and efficiency
• Fully solved numericals according to board pattern
• ALP Smart Syllabus coverage for 2025-26
5.1. A force of 20 N acting at an angle of 60° to the horizontal is used to pull a box through a distance of 3 m across a floor. How much work is done?

5.3. An engine raises 100 kg of water through a height of 80 m in 25 s. What is the power of the engine?

5.4. A body of mass 20 kg is at rest. A 40 N force acts on it for 5 seconds. What is the kinetic energy of the body at the end of this time?

5.6. A 0.14 kg ball is thrown vertically upward with an initial velocity of 35 m s⁻¹. Find the maximum height reached by the ball.

5.10. A box of mass 10 kg is pushed up along a ramp 15 m long with a force of 80 N. If the box rises up a height of 5 m, what is the efficiency of the system?

5.11. A force of 600 N acts on a box to push it 5 m in 15 s. Calculate the power.

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