A block with a relative density of 0.7 is held under water. The buoyant force acting on the block is: a)greater than Fg b)equal Fg c) less than Fg d)equal to the force needed to hold it underwater.

Question

A block with a relative density of 0.7 is held under water.  The buoyant force acting on the block is: a)greater than Fg b)equal Fg c) less than Fg d)equal to the force needed to hold it underwater.

Damon · Accepted Answer

buoyant force up = weight down + force down from hand rho * V * g = m g + F so rho * Volume * g > weight If you have to hold it down, its buoyancy is greater than its weight :)