Answers

2016-01-14T12:49:57+05:30
Upthrust means nothing but buoyancy which means the force exerted when a body is immersed in a liquid .
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2016-01-14T12:53:41+05:30
When an object is immersed in a liquid it experiences an upward force that is called buoyancy or upthrust 

Its direction is always upward 
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