Which of these is false about torque

1. Jul 6, 2008

solars

Which of these is false about torque:
1) torque is 0 unless the force is pointed perpendicular to the moment arm
2) it can only be prodcued by a force
3) torque may pt cw or ccw, depending on direction the force points

I don't know which one of these is false. They all seem pretty true to be, although I suspect #2.

2. Jul 6, 2008

cryptoguy

Re: torque

think about it, what if the force is at a 45 degree angle to the moment arm? Would the torque be 0 in that case?

3. Jul 6, 2008

solars

Re: torque

No. Oh I see so choice 1 is wrong!! Thanks!