Work is scalar

  • Thread starter Misr
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  • #1
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Main Question or Discussion Point

hello people ,

We know that work done is scalar because it’s the product of two vector quantities so it needs only magnitude to be defined.
But look …W = Fd cos theta
When the acting force is in the opposite direction to displacement then theta=180

Therefore the work done becomes negative in this case so work is affected by the directions and its scalar so how?
 

Answers and Replies

  • #2
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Would you like to draw a sketch of a force with its point of application being moved 180 to its line of action?

You should see the answer immediately.
 

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