Question

A body is under the action of three force
F1, F2, and F3 . In which case the body
cannot undergo angular acceleration?
(a) F1 F2, and F3 are concurrent
(b) F1+ F2 + F3 = 0
(c) F1+ F2 is parallel to F3, but the three
forces are not concurrent.
(d) F 1and F2 act at the same point but F3 act at different point.​

Answer 1

Answer:

Only if the three forces are concurrent, they cannot produce a net clockwise or anticlockwise momentum, which is necessary for rotation.