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  • newtonian mechanics - Why does Newtons Third Law actually work . . .
    If your question is "Why does Newton's 3rd law explain how rockets work?" instead of "Why does Newton's third law work?" then "conservation of momentum" works as mentioned below The "system" starts with rocket and fuel stationary (in it's reference frame)
  • Newtons 3rd Law and a bouncing ball - Physics Stack Exchange
    Newton's 3rd law states: If an object A exerts a force on a object B, then the object B will exert a force with the same intensity but opposite direction in object A In your example, the ball is exertion a force on the floor, and the floor is exerting a force on the ball, so the forces won't cancel out because they're not acting on the same
  • Given Newtons third law, why are things capable of moving?
    7 There is a common misconception about newtons 3rd law because of the words"equal and opposite" and many of us think that net force is zero But these forces act on two different bodies and hence the bodies accelerate
  • Why is a book on a table not an example of Newtons third law?
    It then says: Newton's 3rd law applies in all situations and to all types of force But the pair of forces are always the same type, eg both gravitational or both electrical And: If you have a book on a table the book is exerted a force on the table (weight due to gravity), and the table reacts with an equal and opposite force
  • Newtons 3rd law rocket propulsion (detailed explanation)
    The discussion centers around the mechanics of rocket propulsion, specifically how rockets can accelerate in the vacuum of space according to Newton's third law Participants explore various explanations, models, and principles related to rocket thrust, including the role of gas expansion, nozzle design, and pressure dynamics Some participants explain that rocket fuel combusts to create gas
  • How is Newtons 3rd law applied in rocket propulsion?
    Newton's 3rd law says that this gas moving with a lot of force away from the rocket will cause the rocket to experience an equal and opposite force thus allowing the rocket to liftoff I'm curious where the actual collisions happen as the rocket seems to just eject the exhaust without the particles "hitting" anywhere to allow the force to occur
  • Tension and Newtons Third Law - Physics Stack Exchange
    2) By Newton's Third Law, if the rope is pulling on the block, the block must exert an equal and opposite force on the rope So, shouldn't the body not have any motion? A similar question was asked here: With Newton's third law, why are things capable of moving?
  • Proof of Newtons Third Law - Physics Stack Exchange
    That "proof" is just circular reasoning hidden with a bad diagram If you label the masses 1, 2, and 3, it shows that the force of 1 on 2 has to be the opposite of the force of 3 on 2 But Newton's third law relates action-reaction pairs (such as the force of 1 on 2 with the force of 2 on 1, which isn't even drawn on the diagram)
  • Newtons third law and weight - Physics Forums
    No, W and B are not a 3rd law pair Two forces being a third law pair means that they are forces between two objects - one the force from the first object on the second and the other the force from the second on the first W is the force of gravity on the box exerted by the Earth B is the contact force from the Earth's surface exerted on the box
  • newtonian mechanics - What is the force pair for the normal force . . .
    I find that Newton's 3rd law is often written in a way that makes it easy to get confused Here's how I like to write it: If object A exerts a force on object B, then object B exerts a force on object A that has the same strength but opposite direction This makes it clear that you will never ever find two forces from a pair acting on the same object The force of gravity on a ball and the





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