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Physics / Work and Energy

Physics / Work and Energy

We all are familiar with the word 'work'. We do a lot of work every day.
Eg: Imagine you tried to push a rock and the rock does not move. Have u done any work? Think of other such examples from your surroundings.

In this module explore the meaning of "work" in science terminology.

  • Work done is equal to the product of the force and displacement.

               Work done = Force(F) x Displacement (S),
               The SI unit of work done = Newton (N) X meter (m) = Joule (J)

  • The two conditions required to prove that work is done are :          
  1. A force should act on an object.          
  2. The object must be displaced.
  • Can the work done be positive, negative or zero?

             Yes, when displacement occurs in direction of force, it is positive work done,
                     when displacement occurs opposite to the direction of force-it is negative work done.

  • Learn about different types of work done, and also calculate how much work you can do by applying certain force.

Energy is the capability of doing work.

  • Enjoy interesting facts about different forms of energy.

"Energy can neither be created nor be destroyed, but can be converted from one form to another.

e.g. Sun is prime source of energy and its energy is converted to different forms" .

  • Know about renewable and nonrenewable sources of energy

Find out the various techniques to conserve the non-renewable energy resources- coal, petroleum, natural gas, nuclear energy by using renewable energy - solar energy, wind energy, ocean energy, geothermal energy .

By encouraging conservation, increasing investments in clean, renewable sources of energy, and promoting increased domestic production of oil and gas, we can build a more secure future for our country.

Exercises
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Exercises
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  • Work and Energy - SmartTest

    A SmartTest on Work and Energy

    • Accessed by: 563 Students
    • Average Time: 00:07:48
    • Average Score: 71.46
    • Questions: 10
    • Introduction to work and energy
    • Concept of work
    • Formula of work
    • Energy and its types
    • Mechanical energy
    • Transformation and conservation of energy
    • Review of work and energy
  • Work and Energy -- Summary

    Learnhive Lesson on Work and Energy

    • Accessed by: 425 Students

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