If F is the force acting on a particle having position vector r and be the torque of this force about the origin, then:

NEET 2009 Physics question

If is the force acting on a particle having position vector and be the torque of this force about the origin, then:

Answer: (2)

The torque about the origin is . The cross product is perpendicular to both and . A vector perpendicular to another has zero dot product with

Create a free account to read the complete working, and practise questions like this in a timed test.

Question ID VK-090143