Demonstrate that Newton’s third law?

Question

is true by taking some examples from real life. Then, explain how Newton’s third law applies in those situations.

Answer 1

Look at Rockets vs. Gravity.

Answer 2

Shooting a gun is a good example. The 'kick' you get back from firing it is the reaction to the impulse given to the bullet.

A good example of BAD physics is in movies where someone gets hit by a bullet and knocked head over heels. That couldn't happen in real life because the bullet could not give more impulse when it hit something and stopped than the gun gave it when it was fired. If a bullet could actually do this then the person who fired it would also get knocked off their feet!

Answer 3

Example 1: A game of pool.

You strike the cueball, which starts moving.

The cueball strikes another ball at an angle. The other ball starts moving - the cueball "slows down" in both the X and Y directions to the same extent that the other ball has "speeded up".


Example 2: Playing the piano

You touch a key on the piano. The force of your finger causes it to go down (and thus move the rest of the hammer action so it hits the string.)

The force of the key back on your finger is something you can feel, it pushes out the shape of your finger so the end flattens.

Answer 4

Newton's 3rd law states to every action there is a reaction.
Action actually means power . Then it can be restated as follows" to every active power there is a reactive power.
If that is true then it is power that is the cause of all motion in the Universe.
In real life we have power transfers.For example in order to effect a power transfer in an electronic circuit the impedances must match.

When we throw a ball ,we are actually transfering Power from our arm to the ball. The ball would then move at a velocity as per the Power that we transfered to the ball for its motion.

Active power = reactive power.
in other words Power given is equal to Power received.

Answer 5

A good real life example is people who box. When one boxer lands his fist on the other's person jaw, the other's person jaw will return the same force. In other words, the push of the hand on the jaw equals the push of the jaw on the hand. The law more clearly states that if object A exerts a force on object B, then object B exerts an opposite directed force of equal magnitude on object A.

Answer 6

Newtons third Law, for every action there is an equal and opposite reaction. Imagine holding a gun, when you fire it the bullet goes forward and the gun kicks back this is the reaction to the action. Firing the bullet creates a momentum shift (momentum=m*V), in the opposite direction. The momentum is transfered to the gun and into your shoulder

Answer 7

Another simple example is leaning on a wall. If the wall weren't exerting an equal and opposite force to the one you were applying to it, either you'd fall through the wall (if your force was greater than the wall's) or you'd be pushed away from the wall (if the wall's force was greater than yours).

Answer 8

example would be rowing a boat..
your action: paddling
opposite reaction: the movement of the boat
if we would illustrate/draw this scenario, you can see that the force you exert in paddling a boat is opposite the movement of the boat. that's it

Answer 9

Every action has an equal and opposite reaction.