The scalar projection of u onto v is -17.32 , Option A is the correct answer.
A vector is a object with both magnitude and direction .
It is given that
Vectors u and v have magnitudes of 20 and 13
The angle between them is 210°.
the scalar projection of u onto v = ?
[tex]\rm _uv = \dfrac{ |u| |v| cos \theta}{|v|}[/tex]
[tex]\rm _uv = \dfrac{ |20| |13| cos\; 210}{13}[/tex]
= -17.32
Therefore the scalar projection of u onto v is -17.32 , Option A is the correct answer.
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