Shouldn't force pairs equal in magnitude cancel each other?

AI Thread Summary
Newton's Third Law states that for every action, there is an equal and opposite reaction. However, force pairs do not cancel each other unless they act on the same object. In the context of this law, the forces involved are acting on different bodies, which allows for motion to occur. Drawing separate free body diagrams for each object can clarify how these forces interact. Understanding this distinction is crucial for grasping the implications of Newton's Third Law in dynamics.
Varun Narayanan
Messages
3
Reaction score
0

Homework Statement


If every action has an equivalent and opposite reaction, how is that anything ever happens ?. Shouldn't force pairs equal in magnitude cancel each other?

Homework Equations

The Attempt at a Solution


I tried drawing a free body diagram, but it didn't help much. This is a conceptual problem for me
 
Physics news on Phys.org
Hi!
Could you state Newton's Third Law?
 
LemmeThink said:
Hi!
Could you state Newton's Third Law?
Every action has an equal and opposite reaction.
 
Varun Narayanan said:
Shouldn't force pairs equal in magnitude cancel each other?
Two forces can cancel each other only if they are acting on the same body. Is that the case with Newton's 3rd law?
 
  • Like
Likes CWatters
Varun Narayanan said:
Every action has an equal and opposite reaction.
On what object (or objects) are those two forces acting on?
 
Have you drawn a free body diagram for each body separately, showing only the forces acting on each body separately?
 
Back
Top