Question

The radius of the wheel of a wheel and axle is 4 times the radius of a axle. What is the machanical advantage of the wheel and axle?

Answer 1

$\text{Solution}:$

The mechanical advantage of a wheel and axle is defined by:

M.A. = radius of the wheel divided by the radius of the axle.

let x = the radius of the axle, then 4x = the radius of the wheel.

From the definition above:

M.A.=$\frac{4x}{x}$

So M.A. = 4

$\text{Hence 4 is the correct option}$