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 – R/r

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