Question

A body of mass of \(4\;kg\) experiences two forces \(\vec{F_1}=5\hat i+8\hat j+7\hat k \) and \(\vec{F_2}=3\hat i-4\hat j-3\hat k\) then acceleration acting on the body \(R\)

Answer 1

The correct answer is : \(\sqrt6\)
\(\vec{a}=\frac{\vec{F}_{net}}{M}=\frac{8\hat{i}+4\hat{j}+4\hat{k}}{4}\)
\(=2\hat{i}+\hat{j}+\hat{k}\)
\(a=\sqrt{4+1+1}\)
\(=\sqrt6\ m/s^2\)