Inertia is the tendency of an object to resist any change in its motion. The greater the mass of an object, the greater its inertia.

Of the three objects you mentioned, the airplane has the greatest mass, and therefore the greatest inertia. This is because airplanes are typically much larger and heavier than cars or bicycles.

However, it is important to note that inertia is not the only factor that affects an object's motion. Other factors, such as friction and air resistance, can also play a role.

Here is a table summarizing the inertia of the three objects you mentioned:

| Object | Mass (kg) | Inertia |

|---|---|---|

| Car | 1,000 | Low |

| Bicycle | 100 | Medium |

| Airplane | 100,000 | High |

As you can see, the airplane has the greatest inertia, followed by the bicycle, and then the car.