Class 9 Physics Work and Energy Introduction

Introduction

 In day-to-day life, we consider any useful physical or mental labor as work, which is being defined differently in science.

 

  • Two conditions are need to be satisfied for work to be done in science :-
  • A force should act on object.
  • The object must be displaced.

If either of these conditions does not satisfy, we say work done is zero.

 

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