Distance, Position and Section Formula of Vector
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Vector Algebra

87708 Let \(L\) be a line passing through a point \(A\) and parallel to the vector \(2 \hat{i}+\hat{j}-2 \hat{k}\). Let \(-7 \hat{i}-5 \hat{j}+11 \hat{k}\) be the position vector of a point \(P\) on \(L\) such that \(|A P|=12\). Then, the position vector of \(A\) can be

1 \(\hat{i}+\hat{j}+3 \hat{k}\)
2 \(15 \hat{i}+9 \hat{j}-19 \hat{k}\)
3 \(-\hat{i}-\hat{j}+3 \hat{k}\)
4 \(-15 \hat{\mathrm{i}}-9 \hat{\mathrm{j}}+19 \hat{\mathrm{k}}\)
Vector Algebra

87709 Let the vectors \(A B=2 \hat{i}+2 \hat{j}+\hat{k}\) and \(A C=2 \hat{i}+4 \hat{j}+4 \hat{k}\) be two sides of a \(\triangle A B C\). If \(G\) is the centroid of \(\triangle A B C\), then \(\frac{27}{7}|\mathrm{AG}|^2+5=\)

1 25
2 38
3 47
4 52
Vector Algebra

87710 \(\mathrm{L}_1\) is a line passing through the points with position vectors \(\hat{\mathbf{i}}-2 \hat{\mathbf{j}}-\hat{\mathbf{k}}\) and \(4 \hat{\mathbf{i}}-\mathbf{3} \hat{\mathbf{k}}\). \(\mathrm{L}_2\) is a line passing through the points with position vectors \(\hat{\mathbf{i}}+2 \hat{\mathbf{j}}-\hat{\mathbf{k}}\) and \(2 \hat{\mathbf{i}}-4 \hat{\mathbf{j}}-5 \hat{\mathbf{k}}\). Then the distance between \(L_1\) and \(L_2\) is

1 0
2 \(\frac{3}{4}\)
3 \(\frac{4}{3}\)
4 \(\frac{2}{3}\)
Vector Algebra

87711 A vector a has components \(2 p\) and 1 with respect to a two dimensional rectangular cartesian system. This system is rotated through a certain angle about the origin in the counter-clockwise direction. If \(a\) has components \(p+1\) and 1 with respect to the new system, then

1 \(\mathrm{p}=1\) or \(\mathrm{p}=\frac{-1}{3}\)
2 \(\mathrm{p}=-1\) or \(\mathrm{p}=\frac{1}{3}\)
3 \(\mathrm{p}=1\) or \(\mathrm{p}=-1\)
4 \(\mathrm{p}=0\) or \(\mathrm{p}=\frac{1}{2}\)
Vector Algebra

87708 Let \(L\) be a line passing through a point \(A\) and parallel to the vector \(2 \hat{i}+\hat{j}-2 \hat{k}\). Let \(-7 \hat{i}-5 \hat{j}+11 \hat{k}\) be the position vector of a point \(P\) on \(L\) such that \(|A P|=12\). Then, the position vector of \(A\) can be

1 \(\hat{i}+\hat{j}+3 \hat{k}\)
2 \(15 \hat{i}+9 \hat{j}-19 \hat{k}\)
3 \(-\hat{i}-\hat{j}+3 \hat{k}\)
4 \(-15 \hat{\mathrm{i}}-9 \hat{\mathrm{j}}+19 \hat{\mathrm{k}}\)
Vector Algebra

87709 Let the vectors \(A B=2 \hat{i}+2 \hat{j}+\hat{k}\) and \(A C=2 \hat{i}+4 \hat{j}+4 \hat{k}\) be two sides of a \(\triangle A B C\). If \(G\) is the centroid of \(\triangle A B C\), then \(\frac{27}{7}|\mathrm{AG}|^2+5=\)

1 25
2 38
3 47
4 52
Vector Algebra

87710 \(\mathrm{L}_1\) is a line passing through the points with position vectors \(\hat{\mathbf{i}}-2 \hat{\mathbf{j}}-\hat{\mathbf{k}}\) and \(4 \hat{\mathbf{i}}-\mathbf{3} \hat{\mathbf{k}}\). \(\mathrm{L}_2\) is a line passing through the points with position vectors \(\hat{\mathbf{i}}+2 \hat{\mathbf{j}}-\hat{\mathbf{k}}\) and \(2 \hat{\mathbf{i}}-4 \hat{\mathbf{j}}-5 \hat{\mathbf{k}}\). Then the distance between \(L_1\) and \(L_2\) is

1 0
2 \(\frac{3}{4}\)
3 \(\frac{4}{3}\)
4 \(\frac{2}{3}\)
Vector Algebra

87711 A vector a has components \(2 p\) and 1 with respect to a two dimensional rectangular cartesian system. This system is rotated through a certain angle about the origin in the counter-clockwise direction. If \(a\) has components \(p+1\) and 1 with respect to the new system, then

1 \(\mathrm{p}=1\) or \(\mathrm{p}=\frac{-1}{3}\)
2 \(\mathrm{p}=-1\) or \(\mathrm{p}=\frac{1}{3}\)
3 \(\mathrm{p}=1\) or \(\mathrm{p}=-1\)
4 \(\mathrm{p}=0\) or \(\mathrm{p}=\frac{1}{2}\)
Vector Algebra

87708 Let \(L\) be a line passing through a point \(A\) and parallel to the vector \(2 \hat{i}+\hat{j}-2 \hat{k}\). Let \(-7 \hat{i}-5 \hat{j}+11 \hat{k}\) be the position vector of a point \(P\) on \(L\) such that \(|A P|=12\). Then, the position vector of \(A\) can be

1 \(\hat{i}+\hat{j}+3 \hat{k}\)
2 \(15 \hat{i}+9 \hat{j}-19 \hat{k}\)
3 \(-\hat{i}-\hat{j}+3 \hat{k}\)
4 \(-15 \hat{\mathrm{i}}-9 \hat{\mathrm{j}}+19 \hat{\mathrm{k}}\)
Vector Algebra

87709 Let the vectors \(A B=2 \hat{i}+2 \hat{j}+\hat{k}\) and \(A C=2 \hat{i}+4 \hat{j}+4 \hat{k}\) be two sides of a \(\triangle A B C\). If \(G\) is the centroid of \(\triangle A B C\), then \(\frac{27}{7}|\mathrm{AG}|^2+5=\)

1 25
2 38
3 47
4 52
Vector Algebra

87710 \(\mathrm{L}_1\) is a line passing through the points with position vectors \(\hat{\mathbf{i}}-2 \hat{\mathbf{j}}-\hat{\mathbf{k}}\) and \(4 \hat{\mathbf{i}}-\mathbf{3} \hat{\mathbf{k}}\). \(\mathrm{L}_2\) is a line passing through the points with position vectors \(\hat{\mathbf{i}}+2 \hat{\mathbf{j}}-\hat{\mathbf{k}}\) and \(2 \hat{\mathbf{i}}-4 \hat{\mathbf{j}}-5 \hat{\mathbf{k}}\). Then the distance between \(L_1\) and \(L_2\) is

1 0
2 \(\frac{3}{4}\)
3 \(\frac{4}{3}\)
4 \(\frac{2}{3}\)
Vector Algebra

87711 A vector a has components \(2 p\) and 1 with respect to a two dimensional rectangular cartesian system. This system is rotated through a certain angle about the origin in the counter-clockwise direction. If \(a\) has components \(p+1\) and 1 with respect to the new system, then

1 \(\mathrm{p}=1\) or \(\mathrm{p}=\frac{-1}{3}\)
2 \(\mathrm{p}=-1\) or \(\mathrm{p}=\frac{1}{3}\)
3 \(\mathrm{p}=1\) or \(\mathrm{p}=-1\)
4 \(\mathrm{p}=0\) or \(\mathrm{p}=\frac{1}{2}\)
Vector Algebra

87708 Let \(L\) be a line passing through a point \(A\) and parallel to the vector \(2 \hat{i}+\hat{j}-2 \hat{k}\). Let \(-7 \hat{i}-5 \hat{j}+11 \hat{k}\) be the position vector of a point \(P\) on \(L\) such that \(|A P|=12\). Then, the position vector of \(A\) can be

1 \(\hat{i}+\hat{j}+3 \hat{k}\)
2 \(15 \hat{i}+9 \hat{j}-19 \hat{k}\)
3 \(-\hat{i}-\hat{j}+3 \hat{k}\)
4 \(-15 \hat{\mathrm{i}}-9 \hat{\mathrm{j}}+19 \hat{\mathrm{k}}\)
Vector Algebra

87709 Let the vectors \(A B=2 \hat{i}+2 \hat{j}+\hat{k}\) and \(A C=2 \hat{i}+4 \hat{j}+4 \hat{k}\) be two sides of a \(\triangle A B C\). If \(G\) is the centroid of \(\triangle A B C\), then \(\frac{27}{7}|\mathrm{AG}|^2+5=\)

1 25
2 38
3 47
4 52
Vector Algebra

87710 \(\mathrm{L}_1\) is a line passing through the points with position vectors \(\hat{\mathbf{i}}-2 \hat{\mathbf{j}}-\hat{\mathbf{k}}\) and \(4 \hat{\mathbf{i}}-\mathbf{3} \hat{\mathbf{k}}\). \(\mathrm{L}_2\) is a line passing through the points with position vectors \(\hat{\mathbf{i}}+2 \hat{\mathbf{j}}-\hat{\mathbf{k}}\) and \(2 \hat{\mathbf{i}}-4 \hat{\mathbf{j}}-5 \hat{\mathbf{k}}\). Then the distance between \(L_1\) and \(L_2\) is

1 0
2 \(\frac{3}{4}\)
3 \(\frac{4}{3}\)
4 \(\frac{2}{3}\)
Vector Algebra

87711 A vector a has components \(2 p\) and 1 with respect to a two dimensional rectangular cartesian system. This system is rotated through a certain angle about the origin in the counter-clockwise direction. If \(a\) has components \(p+1\) and 1 with respect to the new system, then

1 \(\mathrm{p}=1\) or \(\mathrm{p}=\frac{-1}{3}\)
2 \(\mathrm{p}=-1\) or \(\mathrm{p}=\frac{1}{3}\)
3 \(\mathrm{p}=1\) or \(\mathrm{p}=-1\)
4 \(\mathrm{p}=0\) or \(\mathrm{p}=\frac{1}{2}\)