QJEEM21Ph5919: JEE Main 2021 Physics - Class 11 JEEM21Ph5919 Solution: The resultant of these forces and is approximately ..........…

Question

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The resultant of these forces

\overrightarrow {OP} ,\overrightarrow {OQ} ,\overrightarrow {OR} ,\overrightarrow {OS}

and

\overrightarrow {OT}

is approximately .......... N.

[Take

\sqrt 3 = 1.7

,

\sqrt 2 = 1.4

Given

\widehat i

and

\widehat j

unit vectors along x, y axis]

JEE Main 2021 (Online) 27th August Morning Shift Physics - Vector Algebra Question 21 English

Accepted Answer

\overrightarrow {{F_x}} = \left( {10 \times {{\sqrt 3 } \over 2} + 20\left( {{1 \over 2}} \right) + 20\left( {{1 \over {\sqrt 2 }}} \right) - 15\left( {{1 \over {\sqrt 2 }}} \right) - 15\left( {{{\sqrt 3 } \over 2}} \right)} \right)\widehat i

= 9.25\widehat i

\overrightarrow {{F_y}} = \left( {15\left( {{1 \over 2}} \right) + 20\left( {{{\sqrt 3 } \over 2}} \right) + 10\left( {{1 \over 2}} \right) - 15\left( {{1 \over {\sqrt 2 }}} \right) - 20\left( {{1 \over {\sqrt 2 }}} \right)} \right)\widehat j

= 5\widehat j

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