A triangular block of mass M with angles\[30{}^\circ \],\[~60{}^\circ \], and \[90{}^\circ \] rests with its \[30{}^\circ -90{}^\circ \]side on a horizontal table. A cubical block of mass m rests on the \[60{}^\circ -30{}^\circ \] side. The acceleration which M must have relative to the table to keep m stationary relative to the triangular block assuming frictionless contact is

A triangular block of mass M with angles\[30{}^\circ \],\[~60{}^\circ

1.	A triangular block of mass M with angles\[30{}^\circ \],\[~60{}^\circ \], and \[90{}^\circ \] rests with its \[30{}^\circ -90{}^\circ \]side on a horizontal table. A cubical block of mass m rests on the \[60{}^\circ -30{}^\circ \] side. The acceleration which M must have relative to the table to keep m stationary relative to the triangular block assuming frictionless contact is
A.	\[g\]
B.	\[\frac{g}{\sqrt{2}}\]
C.	(c)\[\frac{g}{\sqrt{3}}\]
D.	\[\frac{g}{\sqrt{5}}\]
Answer» D. \[\frac{g}{\sqrt{5}}\]