Question

Two blocks each of mass $m$ are resting on a frictionless inclined plane as shown in figure. Then which of the following statement about the blocks is correct?

• A. Block $A$ moves down the plane
• B. Block $B$ moves down the plane
• C. Both the blocks remains at rest
• D. Both the blocks moves down the plane

Answer 1

Answer: (A)

Block $A$ moves down the plane

Component of weight responsible for downward movement of the blocks is $mg\sin \theta$
Now $mg\sin {60}^o$ is greater than $mg\sin {30}^o$
$\therefore$ The block $A$ will move's down the plane.