मराठी

The projection of vector aijka→=2i^-j^+k^ along bijkb→=i^+2j^+2k^ is ______.

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प्रश्न

The projection of vector `vec"a" = 2hat"i" - hat"j" + hat"k"` along `vec"b" = hat"i" + 2hat"j" + 2hat"k"` is ______.

पर्याय

  • `2/3`

  • `1/3`

  • 2

  • `sqrt(6)`

MCQ
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उत्तर

The projection of vector `vec"a" = 2hat"i" - hat"j" + hat"k"` along `vec"b" = hat"i" + 2hat"j" + 2hat"k"` is `2/3`.

Explanation:

Projection of a vector `vec"a"` on `vec"b"` is 

`(vec"a"*vec"b")/|vec"b"| =  ((2hat"i" - hat"j" + hat"k")*(hat"i" + 2hat"j" + 2hat"k"))/sqrt(1 + 4 + 4)`

= `2/3`.

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पाठ 10: Vector Algebra - Solved Examples [पृष्ठ २१३]

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एनसीईआरटी एक्झांप्लर Mathematics Exemplar [English] Class 12
पाठ 10 Vector Algebra
Solved Examples | Q 18 | पृष्ठ २१३
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