question_answer

In the diagram shown, friction is completely absent. If a force F has been applied on the wedge such that it moves with a constant velocity than value of normal reaction N' is

A) \[>F\]

B) \[<F\]

C) \[=F\]

D) cannot find

Correct Answer: A

Solution :

[a] For the wedge, \[{{N}^{A}}\sin \theta =F\] \[\therefore {{N}^{A}}=\frac{F}{\sin \theta }.\text{ As sin}\theta \text{1, and so N }\!\!'\!\!\text{ F}\]