JAMB - Physics (2005 - No. 6)
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
(R/r)2
r/R
(r/R)2
R/r
Giải thích
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