The maximum or minimum value of the swaying couple is
A
$$ \pm {\text{cm}}{\omega ^2}{\text{r}}$$
B
$$ \pm {\text{a}}\left( {1 - {\text{c}}} \right){\text{m}}{\omega ^2}{\text{r}}$$
C
$$ \pm \frac{{\text{a}}}{{\sqrt 2 }}\left( {1 - {\text{c}}} \right){\text{m}}{\omega ^2}{\text{r}}$$
D
$$ \pm 2{\text{a}}\left( {1 - {\text{c}}} \right){\text{m}}{\omega ^2}{\text{r}}$$
Correct Answer: $$ \pm \frac{{\text{a}}}{{\sqrt 2 }}\left( {1 - {\text{c}}} \right){\text{m}}{\omega ^2}{\text{r}}$$
