Work and Energy #1| Class 9 Science

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Work is the product of force and displacement. A force is said to do positive work if the force has a component in the direction of the displacement of the point of application. energy is the quantitative property that must be transferred to an object in order to perform work on, or to heat, the object. In this video, we will cover:
1. Work & Energy: Definitions of day-to-day life
2. Scientific Definition of Work
3. Work Examples
4. Work done by a constant force
5. Work: Units
6. Work Done = 0 : Examples
7. Positive & Negative Work
8. Problem 1:- Certain force acting on a 20 kg mass changes its velocity from 5 ms-1 to 2 ms-1. Calculate the work done by the force.
9. NCERT solutions on chapter work and energy
10. Numerical to find force
11. A mass of 10 kg is at a point A on a table. It is moved to a point B. If the line joining A and B is horizontal, what is the work done on the object by the gravitational force? Explain your solution
12. Energy
13. Forms of Energy
14. Kinetic Energy
15. Kinetic Energy: Examples
16. Derivation of K.E. = (1/2) mv2
17. Kinetic Energy: Applications in real life
18. Potential Energy
19. Potential Energy: Examples
20. Derive P.E.= mgh
21. Chapter 11 Class 9 Science

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