In the figure shows two blocks of equal weights designated as W1 and W2 connected together by a rod and resting on an inclined plane whose angle can be varied. The coefficients of friction between the blocks and the surface of the plane are 1 = 0.2 and 2 = 0.3. The value of angle at which the slipping will commence is given by

In the figure shows two blocks of equal weights designated as W1 and W

1.	In the figure shows two blocks of equal weights designated as W1 and W2 connected together by a rod and resting on an inclined plane whose angle can be varied. The coefficients of friction between the blocks and the surface of the plane are 1 = 0.2 and 2 = 0.3. The value of angle at which the slipping will commence is given by
A.	tan = 0.1
B.	tan = 0.2
C.	tan = 0.25
D.	tan = 0.8
Answer» D. tan = 0.8