Q.

Is it true that the object floats only when the upthrust is greater than the weight of the object?


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a

True

b

False 

answer is A.

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Detailed Solution

The above statement is true.
According to Archimedes' principle, when a body is immersed partially or completely in a liquid, it experiences an upthrust called buoyant force, equal to the weight of the liquid displaced by it. If the upthrust is greater than the object's weight, then the net force will work in an upward direction, thus causing it to float.
 
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Is it true that the object floats only when the upthrust is greater than the weight of the object?