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3-1.Vectors
easy
$\mathop r\limits^ \to \,\, = \,\,3\hat i\,\, + \,\,\hat j\,\, + \;\;2\hat k$ સદિશનું $x-y$ સમતલ પર પ્રક્ષેપણનું મૂલ્ય શું હશે ?
A
$3$
B
$4$
C
$\sqrt {14} $
D
$\sqrt {10} $
Solution
Magnitude of projection of this vector on $x – y$ plane will be the square root of sum of squares of its $x – y$ components $=\sqrt{3^2+1^2}=\sqrt{10}$
Standard 11
Physics
