Question

Define the mechanical advantage of an inclined plane.

• A. M.A = Inclined length/Vertical height
• B. M.A = Effort/Load
• C. M.A = Vertical height/Inclined length
• D. M.A = 1

Answer 1

The correct option is A

M.A = Inclined length/Vertical height

M.A = $\frac{Load}{Effort}$ = $\frac{L}{L\sin \theta }$

M.A = $\frac{1}{\sin \theta }$………..(1)

Also, sin $\theta$ = $\frac{perpendicular}{hypotenuse}$ = $\frac{h}{l}$

From (1) M.A = $\frac{1}{\frac{h}{l}}$ = $\frac{l}{h}$