a particle is acted upon by a force F=(i-2j+k) N If the particle is at P(-1,2,3) , the - Physics -

Question

a particle is acted upon by a force F=(i-2j+k) N If the particle
is at P(-1,2,3) , the torque of the force about Q(2,3,1) is ?

Kumar Prabhat · Accepted Answer

PQ→ =Q→ -P→
=2i+3j+k--i+2j+3k=3i+j-2kTorque=PQ→
×F→τ=ijk31-21-21=i1-4-j3+2+k-6-1τ=-3i-5j-7k

a particle is acted upon by a force F=(i-2j+k) N . If the particle is at P(-1,2,3) , the torque of the force about Q(2,3,1) is ?