Question

The upward force exerted by the floating body on the fluid is known as upthrust.
A. True
B. False

Answer 1

Hint: Learn Archimedes’ principle and then solve this problem. By Archimedes’ principle “the upward force exerted by the fluid on the floating body is known as upthrust”.

Complete step by step answer:
Buoyancy force or upthrust force is an upward force exerted by a fluid that opposes the weight of a partially or fully immersed object. In a column of a fluid, the pressure increases with depth as a result of weight of the overlying fluid. Thus the pressure at the bottom of a column of fluid is greater than at the top of column. Similarly, the pressure at the bottom of an object submerged in a fluid is greater than at the top of the object. The pressure difference results in a net upward force on the object. The magnitude of force is proportional to the pressure difference and is equivalent to the weight of the displaced fluid.
Buoyancy force or upthrust = weight of the displaced fluid
This principle is known as Archimedes’ principle

Note: Students should remember that upward force exerted by the fluid on the floating body is not upward force exerted by the floating body on the fluid. Students always get confused between these two conditions and can write incorrect answers.