If vector v1 = 3i cap+4j cap+k cap and v2= i cap -j cap- k cap determine the magnitude of vector v1+vector v2
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\text{The magnitude of }\vec{v_1}+\vec{v_2}\text{is}The magnitude of v1+v2is
|\vec{v_1}+\vec{v_2}|=5∣v1+v2∣=5
Explanation:
Given:
\vec{v_1}=3\:\hat{i}+4\:\hat{j}+\hat{k}v1=3i^+4j^+k^
\vec{v_2}=\hat{i}-\hat{j}-\hat{k}v2=i^−j^−k^
\implies\:\vec{v_1}+\vec{v_2}=4\:\hat{i}+3\:\hat{j}+0\hat{k}⟹v1+v2=4i^+3j^+0k^
\text{The magnitude of }\vec{v_1}+\vec{v_2}\:\text{is}The magnitude of v1+v2is
|\vec{v_1}+\vec{v_2}|=\sqrt{4^2+3^2+0^2}∣v1+v2∣=42+32+02
\implies\:|\vec{v_1}+\vec{v_2}|=\sqrt{16+9}⟹∣v1+v2∣=16+9
\implies\:|\vec{v_1}+\vec{v_2}|=\sqrt{25}⟹∣v1+v2∣=25
\implies\:\boxed{|\vec{v_1}+\vec{v_2}|=5}⟹∣v1+v2∣=5
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