How can objects move if every action has an equal and opposite reaction?

  • Context: High School 
  • Thread starter Thread starter MrPickle
  • Start date Start date
  • Tags Tags
    Reactions
Click For Summary
SUMMARY

The discussion clarifies the misconception surrounding Newton's Third Law of Motion, which states that for every action, there is an equal and opposite reaction. It emphasizes that forces act on different objects, allowing for movement. For instance, when a ball is dropped from a building, the gravitational force from the Earth acts on the ball, while the ball exerts an equal force on the Earth. This interaction explains how both the ball and the Earth can move, despite the law's stipulations.

PREREQUISITES
  • Understanding of Newton's Laws of Motion
  • Basic knowledge of gravitational forces
  • Familiarity with the concept of action-reaction pairs
  • Awareness of the effects of drag on falling objects
NEXT STEPS
  • Explore detailed explanations of Newton's Third Law of Motion
  • Investigate the effects of drag on falling objects in physics
  • Study real-world applications of action-reaction pairs in engineering
  • Learn about gravitational force calculations and their implications
USEFUL FOR

Students of physics, educators explaining motion concepts, and anyone interested in understanding the principles of forces and motion.

MrPickle
Messages
56
Reaction score
0
This law is confusing me. If everything needs an equal and opposite reaction how do things move? Surely everything should be stationary if this law is true?
 
Physics news on Phys.org
The forces act on different objects. For example, consider a ball dropped from a building. Ignoring drag, there is only 1 force acting upon it, which is the pull of gravity from the Earth acting on the ball. The other force that makes this an equal and opposite reaction is the ball pulling on the Earth. The forces are acting on different objects, therefore both objects move.
 
Oh, I see! Thank you :)
 

Similar threads

Replies
5
Views
2K
  • · Replies 3 ·
Replies
3
Views
10K
  • · Replies 49 ·
2
Replies
49
Views
5K
  • · Replies 14 ·
Replies
14
Views
2K
  • · Replies 11 ·
Replies
11
Views
2K
  • · Replies 10 ·
Replies
10
Views
2K
  • · Replies 7 ·
Replies
7
Views
2K
  • · Replies 8 ·
Replies
8
Views
2K
  • · Replies 8 ·
Replies
8
Views
2K
  • · Replies 9 ·
Replies
9
Views
2K