question_answer

When effort is applied parallel to an inclined frictionless plane making an angle \[\theta \] with the horizontal, then mechanical advantage of the system is

A)                

B)         \[\tan \theta \]

C)  \[\cot \theta \]              

D)         \[\text{cosec }\theta \]  

Correct Answer: D

Solution :

Mechanical advantage\[=\frac{Load}{Effort}\]             \[=\frac{mg}{mg\sin \theta }=\cos \text{ec}\theta \]