Question

Two identical blocks A and B of different materials
float on water such that 90% of A and 15% of B
remain submerged inside water. Compare :
(i) density of A and B.
(ii) upthrust of water on A and B.​

Answer 1

Answer:

(i) B density is less than A

Explanation:

(ii) upthrust on A is more

Answer 2

Explanation:

Upthrust = weight of water displaced

U = m g

U = Density of water x Volume of object x g

The density of water = 1000 kilograms per cubic metre

U = 1000 V g

So an object of volume one cubic metre will experience an upthrust in water =

1000 x 1 x 9.8 = 9800 N