A solid disc rolls clockwise without slipping over a horizontal path with a constant speed $\upsilon $. Then the magnitude of the velocities of points $A, B$ and $C$ (see figure) with respect to a standing
$\upsilon ,\,\upsilon {\rm{ \,and\, }}\upsilon $
$2\upsilon ,\,\sqrt 2 \upsilon {\rm{ \,and\,}}\,{\rm{zero}}$
$2\upsilon ,\,2\upsilon {\rm{\,and\,}}\,{\rm{zero}}$
$2\upsilon ,\,\sqrt 2 \upsilon {\rm{\,and\,}}\,\sqrt 2 \upsilon $
A solid disc rolls clockwise without slipping over a horizontal path with a constant speed $\upsilon $. Then the magnitude of the velocities of points $A, B$ and $C$ (see figure) with respect to a standing