General Knowledge - Physics - Discussion

2 vectors can never give zero resultant but 3 vectors will give it, e.g let vectors N and P with value 4 and 6 move rightward while vector T with value 10 moves leftward. Therefore, there resultant is zero (0).

Yes in case of b two vectors combine with each other to give a resultant vector which is equal and opposite to third vector.

Answer is Three

One is obviously out. Two is out because if two unequal forces n and p act on an object the resultant with the minimum force in magnitude is |n - p|, which will never be 0 if n =/= p.

Three can be easily resolved with a quick example. Imagine an object with three concurrent forces acting on it.

Two forces, n = 3 N and p = 4 N, create an angle with eachother such that the resultant is 5 N. 180 degrees from the resultant, a force, r = 5 N, is acting on the object.

Thus three unequal vectors on an object can result in 0.