Disha Karnataki
Full Member level 5
the dot product of two vectors is scalar.
cross product of two vectors is vector.
my question is:i know that force is vector so as displacement but the dot product of force & displacement gives scalar i.e is nothing but work done.
i know already that work-done is a scalar quantity but, if i didn't knew that it is a scalar then suppose i go to take a cross product of these two vectors then i will get a vector out of it which is directed perpendicular to the surface of these to vectors acting.what will i name this new vector or rather what is it??
now,if i only have to decide whether the resulting quantity is scalar or vector then what is use of cross or dot product??
cross product of two vectors is vector.
my question is:i know that force is vector so as displacement but the dot product of force & displacement gives scalar i.e is nothing but work done.
i know already that work-done is a scalar quantity but, if i didn't knew that it is a scalar then suppose i go to take a cross product of these two vectors then i will get a vector out of it which is directed perpendicular to the surface of these to vectors acting.what will i name this new vector or rather what is it??
now,if i only have to decide whether the resulting quantity is scalar or vector then what is use of cross or dot product??