According to Archimede's, an object will float in water if the buoyant force is greater than the weight of fluid displaced. Hence, blob doesn't sink when it's weight is less than or equal its buoyant force.
- The upward force exerted on an object by a fluid is called the buoyant force.
- The buoyant force acts against the downward force cause by the weight of the blob.
- If the downward force is greater than the buoyant force, then the blob will sink.
Therefore, when the weight is less than or equal the buoyant force, then blob will float.
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