A wheel and axle on a bicycle are designed with an axle radius of 0.125 meters and a wheel radius of

0.5 meters. If a force of 800 newtons is applied to the axle, what is the maximum output force of the bike
wheel? (1 point)

3,200 N

100 N

200 N

800 N

1 answer

To find the maximum output force of the bike wheel given the force applied to the axle, we can use the principle of mechanical advantage in a wheel and axle system.

The mechanical advantage (MA) can be calculated using the ratio of the radii of the wheel and the axle:

\[ MA = \frac{R_{wheel}}{R_{axle}} \]

Where:

  • \(R_{wheel} = 0.5 , \text{m}\) (radius of the wheel)
  • \(R_{axle} = 0.125 , \text{m}\) (radius of the axle)

Now, substituting the values:

\[ MA = \frac{0.5}{0.125} = 4 \]

Now, the output force can be calculated by multiplying the applied force by the mechanical advantage:

\[ F_{output} = MA \times F_{input} \]

Where:

  • \(F_{input} = 800 , \text{N}\)

Thus,

\[ F_{output} = 4 \times 800 , \text{N} = 3200 , \text{N} \]

Therefore, the maximum output force of the bike wheel is 3,200 N.