Disadvantage of normal force?

One disadvantage of the normal force is that it can only act perpendicular to the surface of contact between two objects. This means that it cannot prevent objects from sliding or moving parallel to the surface, which can limit its effectiveness in certain situations. Additionally, the normal force is a reactive force that only occurs when two objects are in contact, so it cannot be used to actively push or pull objects in a desired direction.

- It can be difficult to measure. Normal force is a contact force, which means that it only exists when two objects are in contact with each other. This can make it difficult to measure, as it requires a sensor that can be placed between the two objects.
- It can be variable. Normal force can vary depending on the surface roughness, the relative velocity of the two objects, and the temperature. This can make it difficult to predict the magnitude of normal force in a given situation.
- It can cause friction. Normal force can cause friction between two objects, which can reduce their efficiency and increase wear and tear.

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