00:01
All right, so part a, let's look at an example where we have a net force on an object, or the net force is zero, but the torque is non -zero.
00:07
So an easy way, let's imagine we have a force f applied to the rim of an object, and a force of the same magnitude applied to the rim on the other object.
00:16
So the net force, which only exists in the x direction, you can see, is just going to be zero.
00:22
So really, there's no net force.
00:23
But, of course, the torque, if this has a radius of r, is going to be 2f times r in magnitude.
00:30
So it's non -zero...