English
Hindi
3-1.Vectors
normal

$3\,N$, $4\,N$ અને $12\, N$ જેટલું બળ એક બિંદુ પર પરસ્પર લંબ દિશામાં લાગે છે. તો પરિણામી બળ નું મૂલ્ય  ............. $\mathrm{N}$ શોધો ?

A

$19 $

B

$13$

C

$11$

D

$5$

Solution

Since all are mutually perpendicular thus cosine of angles between them is $zero$.Thus magnitude of resultant can be simply given as $\sqrt{3^2+4^2+12^2}=\sqrt{169}=$ $13 N$

Standard 11
Physics

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