According to Newton's third law of motion, if there is a beaker with 100g water, the normal force exerted by the bottom of the beaker would be equal to the force by the weight of the water in it..
What would happen if a wooden block is now half submerged into the beaker? Is the new normal force going to be the sum of the weight of the beaker and the weight of the wooden block? Will upthrust affect the normal force in causing it to be less than the sum of these two masses? I think that it would, but am really just confused and unable to explain it. An explanation of what actually happens during these two situations would be greatly appreciated, thanks!