Question

define upthrust and write its characteristics properties​

Answer 1

Answer:

The effect of upthrust is that the weight of the body immersed in a liquid appears to be less than its actual weight.

Explanation:

The upthrust has the following three characteristic properties :

(i) Larger the volume of body submerged in fluid, greater is the upthrust.

(ii) More the density of fluid, greater is the upthrust.

(iii) The upthrust acts on the body in upward direction at the centre of gravity of the displaced fluid which is called the centre of buoyancy

Answer 2

The upward force exerted by any fluid is called upthrust.

Explanation:

• An object that is partly or completely, submerged experiences a greater pressure on its bottom surface than on its top surface. This causes a resultant force upwards. This force is called upthrust.
• The upward force exerted on a body by the fluid in which the body is submerged is called the upthrust or buoyant force.

• Archimedes’ principle is explained based on this upthrust:

When a body is immersed partially or completely in a liquid, it experiences an upthrust, which is equal to the weight of the liquid displaced by it.

• The upthrust has the following three characteristic properties :

1. Larger the volume of body submerged in fluid, greater is the upthrust.
2. More the density of fluid, greater is the upthrust.
3. The upthrust acts on the body in upward direction at the center of gravity of the displaced fluid which is called the center of buoyancy.