Two forces with equal magnitudes $F$ act on a body and the magnitude of the resultant force is $F/3$. The angle between the two forces is
${\cos ^{ - 1}}\left( { - \frac{{17}}{{18}}} \right)$
${\cos ^{ - 1}}\left( { - \frac{1}{3}} \right)$
${\cos ^{ - 1}}\left( {\frac{2}{3}} \right)$
${\cos ^{ - 1}}\left( {\frac{8}{9}} \right)$
Can the resultant of $2$ vectors be zero
Magnitude of vector which comes on addition of two vectors, $6\hat i + 7\hat j$ and $3\hat i + 4\hat j$ is
Let the angle between two nonzero vectors $\overrightarrow A $ and $\overrightarrow B $ be $120^°$ and resultant be $\overrightarrow C $
Two forces of magnitude $3\;N$ and $4\;N $ respectively are acting on a body. Calculate the resultant force if the angle between them is $0^o$
Two forces are such that the sum of their magnitudes is $18\; N$ and their resultant is $12\; N$ which is perpendicular to the smaller force. Then the magnitudes of the forces are