Question

two forces f1 vector = l+2j+4k and f2 vector = 2l+j are acting simultaneously at a point. What is the magnitude of the resultant force.

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Answer 1

Answer:

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Answer 2

$\underline{\mathrm{Answer}}: \\ \\ \mathrm{f_1 = \hat{i}\ +\ 2\hat{j}\ +\ 4\hat{k}} \\ \\ \mathrm{f_2 = 2\hat{i}\ +\ \hat{j}} \\ \\ \mathrm{f_{net}= f_1 + f_2 = 3\hat{i}\ +\ 3\hat{j}\ +\ 4\hat{j}} \\ \\ \mathrm{Magnitude\ of\ resultant\ force\ is:}\\ \\ \mathrm{|f_{net}|=\sqrt{(3)^2 + (3)^2 + (4)^2}= \sqrt{34}}\\ \\ \\ \boxed{\mathrm{Therefore \ magnitude\ of \ resultant\ force\ is: \sqrt{34}}} \\ \\ \mathrm{Hope\ this\ helps\ :\ ) }$