In an ideal wheel an axle system, R stand for the radius of the wheel and r is the radius of the axle. the mechanical advantage is
-
A.
(R/r)2 -
B.
r/R -
C.
(r/R)2 -
D.
R/r
Correct Answer: Option D
Explanation
In a wheel and axle system of mechanic, the mechanical advantage is given by its ratio of the radius of the wheel R, to the radius of the axle r. that M.A = R/r