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Grade 12th passMechanics

How we can identify scalar and vector quantities ex work is scalar

Profile image of Satyam mishra
6 Years agoGrade 12th pass
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3 Answers

Profile image of Arun
6 Years ago
A vector quantity has a direction and a magnitude, while a scalar has only a magnitude. You can tell if a quantity is a vector by whether or not it has a direction associated with it. Example: Speed is a scalar quantity, but velocity is a vector that specifies both a direction as well as a magnitude
work has no direction hence it is scalar
Profile image of Vikas TU
6 Years ago
Dear student 
Hope you understand vector and scalar , 
But here is the resion why work s scalar quantity 
work done due to displacement caused by a force is a scalar quantity. The dot product of vector quantities is always scalar which means it is has only magnitude and no direction.
Hope this helps 
Good Luck 
Profile image of aswanth nayak
6 Years ago
Dear Student,
 
vector quantity has a direction and a magnitude, while a scalar has only a magnitude. You can tell if a quantity is a vector by whether or not it has a direction associated with it. Example: Speed is a scalar quantity, but velocity is a vector that specifies both a direction as well as a magnitude.Hence it is Scalar because it has no DIRECTION.
 
Hope this helps you
Regards