Newton's third law is not correct

In summary, Newton's Third Law states that for every action, there is an equal and opposite reaction. This means that when two objects interact, the forces they exert on each other are always equal in magnitude and opposite in direction. This holds true regardless of the type of force (A) or the bodies on which the forces act (B). The statement that is not correct is D, which states that the forces are always equal in magnitude at all times. This is not always the case, as the magnitude of the forces can change depending on the situation.
  • #1
juviena
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Newton's Third Law concerns the forces of interaction between two bodies.
Which of the following statements relating to the third law is not correct ?

A. The two forces must be of same type
B. The two forces must act on different bodies.
C. The two forces are always opposite in direction
D. The two forces are at all times equal in magnitude.
E. The two forces are equal and opposite so the bodies are in equilibrium

Ans is D but why can't be A or B ?
 
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  • #2
MUST THE FORCES are of same type?
 
  • #3
juviena said:
Newton's Third Law concerns the forces of interaction between two bodies.
Which of the following statements relating to the third law is not correct ?

A. The two forces must be of same type
B. The two forces must act on different bodies.
C. The two forces are always opposite in direction
D. The two forces are at all times equal in magnitude.
E. The two forces are equal and opposite so the bodies are in equilibrium

Ans is D but why can't be A or B ?

Who said that the proper response is D?

Can you explain to us the third law in your own words?
 
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FAQ: Newton's third law is not correct

What is Newton's third law?

Newton's third law states that for every action, there is an equal and opposite reaction. This means that when one object exerts a force on another object, the second object will exert an equal and opposite force back on the first object.

Why do some people say that Newton's third law is not correct?

Some people may argue that Newton's third law is not correct because it does not take into account other factors such as friction, air resistance, and the deformations of objects when they collide. Additionally, at very small scales, such as the quantum level, Newton's laws do not accurately describe the behavior of particles.

What evidence supports Newton's third law?

There is a vast amount of evidence that supports Newton's third law. It can be observed in everyday situations, such as when we walk or push objects. It is also supported by experiments and mathematical calculations, which consistently show that forces always occur in pairs and are equal in magnitude but opposite in direction.

How does Newton's third law relate to the conservation of momentum?

Newton's third law is closely related to the conservation of momentum, which states that the total momentum of a closed system remains constant. This means that when two objects interact, the total momentum of the system before and after the interaction is the same. Newton's third law explains how forces are exchanged between objects, leading to changes in momentum.

Is there any situation where Newton's third law does not apply?

Newton's third law is a fundamental principle in physics and applies to most situations involving the interaction of objects. However, it may not accurately describe the behavior of particles at very small scales or in extreme conditions, such as near the speed of light or in the presence of strong gravitational fields. In these cases, other laws, such as quantum mechanics or general relativity, are needed to fully explain the behavior of objects.

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