In the weightlessness state, bodies :

Question

Accepted Answer

In a state of weightlessness, such as in space or free-fall, bodies experience a unique set of physical conditions. Let's explore why Option 3, "have no weight, but possess inertia," is the correct answer, and why the other options are incorrect.

### Explanation for Option 3:

1. **No Weight**: In a weightless environment, such as in orbit around Earth, objects are in free-fall, meaning they are falling towards Earth but also moving forward fast enough to keep missing it. This creates a sensation of weightlessness because there is no normal force acting on the body. Weight is the force exerted by gravity on an object, and in free-fall, this force is not felt because everything is accelerating at the same rate.

2. **Possess Inertia**: Inertia is a property of matter that describes an object's resistance to changes in its state of motion. It is directly related to mass, not weight. Even in a weightless environment, objects still have mass, and therefore, they retain their inertia. This means they will resist changes to their motion unless acted upon by an external force.

### Why Other Options are Incorrect:

1. **Option 1: have no weight, no inertia**:
   - This option is incorrect because, while objects in a weightless state indeed have no weight, they still possess inertia. Inertia is a fundamental property of mass and does not disappear in weightlessness.

2. **Option 2: have weight, have inertia**:
   - This option is incorrect because objects in a weightless state do not have weight. Weight is the gravitational force experienced by an object, and in a state of free-fall or orbit, this force is not felt. However, they do have inertia, but the presence of weight in this option makes it incorrect.

3. **Option 4: have weight, but don't possess inertia**:
   - This option is incorrect because, in a weightless state, objects do not have weight. Additionally, all objects with mass have inertia, regardless of their weight. Therefore, the claim that they don't possess inertia is false.

In conclusion, Option 3 is the correct answer because it accurately describes the conditions of weightlessness: objects have no weight but still possess inertia due to their mass.