Question

A force vector F = αi+3j+6k is acting at a point vector r = 2i-6j-12k. The value of * for which angular momentum about origin is conserved is

(a) zero

(b) 1

(c) -1

(d) 2

Answer 1

Correct option (c) -1

Explanation:

For the conservation of angular momentum about origin, the torque t acting on the particle will be zero.