If work done is a scalar …

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If work done is a scalar quantity then why do we have positive and negative form of work?

Posted by Nancy Rajput 7 years, 4 months ago

CBSE > Class 11 > Physics

6 answers

Devashri Kulkarni 7 years, 4 months ago

Work done is a scalar quantity as it is a dot product of two vector quantities (W=F.S) , and dot product of any two quantities is a scalar quantity. Infact dot product is also known as scalar product. But since force and displacement are vector quantities they can be negative in value and hence work done can also turn out to be negative.

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Subam Sihag 7 years, 4 months ago

Work done is scaler quantity bcz dot product of two vector quantity is always scaler (W=F.D)

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Aman Kumar 7 years, 4 months ago

That what I m saying. It is vector quantity

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Isha Bhardwaj 7 years, 4 months ago

I think work done is not a scalar quantity bcoz , It is product of force and displacement and these both are vector quantities....

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Nancy Rajput 7 years, 4 months ago

you explain me in detail

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Aman Kumar 7 years, 4 months ago

R u sure work done is scaler quantity... Because W.D= force ×displacement... And displacement has direction and direction can be positive or negative... If u r confused than sry.. I can't able to give this answer.

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