Question

A block (mass $=M kg$ ) is placed on a rough inclined plane. A force $F$ is applied parallel to the inclined (as shown in figure) such that it just starts moving upward. The value of $F$ is

• A. $M g \sin \theta-\mu M g \cos \theta$
• B. $M g \sin \theta+\mu M g \cos \theta)$
• C. $M g \sin \theta$
• D. $\mu M g \cos \theta$

Answer 1

Answer: (B)

$F$ will oppose friction force and gravitation force
$F=m g \sin \theta+\mu m g \cos \theta$