what is the mechanical advantage if the radius of the wheel is 49 cm and the radius of the axle is 7 cm?
MA= radius of wheel / radius of the axle
A)16
B)21
C)7
D)3
MA = radius of wheel / radius of the axle
MA = 49 cm / 7 cm
MA = 7
Therefore, the mechanical advantage is 7. Hence, the correct option is C) 7.