Question

The table shows dimensions of four wheel and axles.


Which shows the order of mechanical advantage from least to greatest?

A- Y, X, W, Z

B- Z, W, X, Y

C- Z, X, W, Y

D- Y, Z, W, X



Answe is b

Answer 1

Mechanical advantage is given by formula

$MA = \frac{F_{out}}{F_{in}}$

here we know that for torque balance in pulley system we have

$F_{out}\times r_1 = F_{in}\times r_2$

$MA = \frac{r_2}{r_1}$

for W

$MA = \frac{12}{4} = 3$

for X

$MA = \frac{36}{9} = 4$

For Y

$MA = \frac{18}{3} = 6$

For Z

$MA = \frac{16}{8} = 2$

so least to greatest order will be

Z < W < X < Y

so correct answer is

B- Z, W, X, Y

Answer 2

Answer:

b

Explanation: