Question

" The vector sum of the forces of 10 newton and 8 newton cannot be : (1) 2N (2) 8N (3) 18N (4) 20N ​

Answer 1

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$\mathrm{20N } \\ \\ {\mathtt{ \vec{10}} +_ - \vec{8}} = [2N,18N] \\ \\ \tt{so \: it \: includes \: evey} \:\ \: \tt{ values \: between \: 2 \: to \: 18}$

Answer 2

Answer: 20N is not between 2 and 18 hence it is the answer