Is Archimedes principle violative of Newton's 3rd law of motion?

In summary, according to Newton's third law of motion, when a heavier body with a density greater than water is submerged in water, it experiences an upward thrust equal to its weight. However, this does not always result in the body remaining afloat. This may seem to violate Newton's third law, but it can be explained by considering the direction of the force vector. Additionally, we cannot move a car or bus by pushing on it from the inside, but we can make them move by pushing on them from the outside. This is also due to the direction of the force vector.
  • #1
ankit1
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1. When a heaveir body having density more than water, is submerged in water, as per Newton's third law of motion, it experiences an equal & opposite thrust i.e. an upward thrust equal to its weight. Then, the body should have remained afloat, but, we find it sinks. Is it not violative of Newton's 3rd law?
Further, we cannot move a car/bus by our push while sitting/standing inside. But, we can make them move by push from outside.Why?




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  • #2
What do you think? The template is there for you, not us, to fill in. We help you do your own homework. We do not do it for you. You need to show some work.
 
  • #3
Go back and look at the chapter of the Newton's third law. You should note the point the force vector acting and the answer is obvious.
 

1. What is Archimedes principle?

Archimedes principle states that the buoyant force acting on an object immersed in a fluid is equal to the weight of the fluid that the object displaces.

2. What is Newton's 3rd law of motion?

Newton's 3rd law of motion states that for every action, there is an equal and opposite reaction.

3. How does Archimedes principle relate to Newton's 3rd law of motion?

Archimedes principle does not violate Newton's 3rd law of motion. In fact, it is a direct result of the law. The buoyant force acting on an object is the reaction force to the object's weight, which is the action force.

4. Can you explain how Archimedes principle is not violative of Newton's 3rd law of motion?

According to Newton's 3rd law of motion, the force exerted by the fluid on the object is equal and opposite to the force exerted by the object on the fluid. Therefore, the buoyant force acting on the object is the reaction force to the object's weight, satisfying the law.

5. Are there any other laws or principles that support the relationship between Archimedes principle and Newton's 3rd law of motion?

Yes, the principle of action and reaction is a foundational concept in physics and is supported by various other laws and principles, including Newton's 3rd law of motion, Archimedes principle, and the laws of conservation of momentum and energy.

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