Question

Sum from vectors in physics need help to solve it...........Attachment given below.

Answer 1

Answer:

P vector = i + 2j - k

Q vector = 2i -j -3k

1) Pvector + Qvector = 3i + j -4k

2) Pvector - Qvector = -i +3j +2k

3) Magnitude of Pvector + Qvector = $\sqrt{3^{2} +1^{2}+ 4^{2} }$ = $\sqrt{26}$

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Answer 2

Answer:

Explanation

Just add the p+q =I +2j-k +2i -j-3k =3i +j-4k

Modulus p+q = √ 3²+ 1² (-4)² = √26

P-q = I+2 j -k -( 2i -j-3k)

i +2j -k -2i +j +3j = -i +3j +2k