Question

Which pair of the following forces will never give resultant force of `2 N`?
A. `2 N and 2 N`
B. `1 N and 1 N`
C. `1 N and 3 N`
D. `1 N and 4 N`

Answer 1

Correct Answer - D
If two vectors A and B are given then range of their resultant can be written as `(A-B) le Rle(A+B)`
i.e., `R_(max)= A+B and R_(min)= A-B`
If `B=1` and `A= 4` then their resultant will lies in between `3N` and `5N`. It can never been `2N`
If therse three vector are represented by three sides of triangle then they from equilateral triangle.