A student was asked to find the work done by taking the dot product of `vec r and vec F.` Instead of that he found out the cross product `vec r xx vec F`. Which physical quantity will be represented by `vec r xx vec F` ?

Options

A. Energy
B. Linear momentum
C. Torque
D. Impulse

Answer

C

Explanation

`vec r cdot vec F` gives the work done while `vec r xx vec F` gives the torque or couple acting on the body.