|Mar27-10, 09:59 AM||#1|
Work is scalar
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?
|Mar27-10, 12:00 PM||#2|
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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