Difference between Newton's 2nd Law/3rd Law of motion?

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SUMMARY

The discussion clarifies the distinctions between Newton's 2nd Law and 3rd Law of motion. Newton's 2nd Law, expressed as F=ma, defines the relationship between force, mass, and acceleration, indicating that an object will accelerate in response to an applied force. In contrast, Newton's 3rd Law states that for every action, there is an equal and opposite reaction, meaning that when a force is applied to an object, that object exerts an equal force back. Both laws are essential for understanding the mechanics of a rocket's flight, as they work in conjunction to explain the forces at play.

PREREQUISITES
  • Understanding of Newton's Laws of Motion
  • Basic knowledge of physics concepts such as force and acceleration
  • Familiarity with the equation F=ma
  • Concept of action-reaction pairs in physics
NEXT STEPS
  • Study the applications of Newton's 2nd Law in various physical scenarios
  • Explore real-world examples of Newton's 3rd Law, such as rocket propulsion
  • Investigate the implications of force and acceleration in different mass systems
  • Review problem-solving techniques for physics questions involving both laws
USEFUL FOR

Students studying physics, educators teaching Newton's Laws, and anyone interested in the principles of motion and force dynamics.

jakeginobi
1. The problem statement, all variables and given/known dat
What is the difference between Newton's 2nd and 3rd law of motion? Are they related as in if I applied force so that an object accelerates, would it exert the same amount of force towards me?

Homework Equations


F=ma
 
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Yes, they would.
 
I can't differentiate which law (best choice) to put on a test, cause I'm confused about the 2nd law and 3rd.
For instance, a rocket up in the air - would the best choice be law 2 or 3?
 
Both are needed for a rocket to fly. Which is the correct answer will depend on what the question is.
 

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