Question

Which of the following helps t explain why you can lift heavy objects more easily when they are in water?

A. Archimedes' principle
B. Pascal's principle
C. Bernoulli's principle
D. Flow rate equation

Answer 1

(A) Archimedes Principle

Explanation:

This principle formalizes what we experience as "buoyancy." A submerged object in a fluid is acted upon by a buoyancy force that is equivalent in magnitude and opposite in direction to the weight of the fluid displaced by the object.

Answer 2

A. Archimedes' principle

Step-by-step explanation:

When an object is submerged into the liquid then due to Archimedes principle we can say that the upthrust on the object due to liquid is equal to the weight of the liquid displaced by the object.

So when heavy object is in air then the force to lift the object upwards is equal to the weight of the object

so it is given as

`F = mg`

now if the object is submerged into the liquid then it will have upthrust due to liquid on it which is same as the weight of liquid displaced by it

so here net force required to pull it up is given as

`F' = mg - F_(thrust)`

so correct answer is

A. Archimedes' principle