Question

two equal opposite forces act on a rigid body . under what conditions will the body .
1) rotate
2) will not rotate

Answer 1

Dear Student,

(a) Two equal and opposite forces acting on a rigid body such that their lines of action don't coincide constitute a couple. This couple produces the turning effect on the body. Hence, the rigid body will rotate.
(b) If the two equal and opposite forces act in such a way that their lines of action coincide, then the body will not rotate.

Regards