question_answer

A block of mass m is placed on a smooth inclined plane of inclination with the horizontal. The force exerted by the plane on the block has a magnitude

A)  \[mg\]                                

B)  \[mg/cos\theta \]

C)  \[mg\text{ }cos\text{ }\theta \]              

D)  \[mg\tan \theta \]

Correct Answer: C

Solution :

                The force exerted by the plane on the block has magnitude\[mg\,\cos \theta \].