Question

a plastic block of volume is made out of a material of density P is floating in a liquid of density sigma contain in a beaker. during the free fall of the breaker, the upthrust on the block will be.



equal to vg{p - sigma}

slightly more than the weight of the block

slightly less than the weight of the block

zero ​

Answer 1

Answer:An object will float if its average density is less than the average density of the fluid it is immersed in. But you might ask, how can a cruise ship, which is constructed of metals weighing thousands of kilograms, float on water if all those dense metals have a higher average density than water?

Well, air has a lower average density than water and cruise ship's have air submerged beneath the water (ie, between the ship's lower decks) which lowers the ship's average density to be less than that of water.

So if you built shoes that lowered your average density to be less than water than yes, you would be able to walk on water.

Explanation: hope this helps you