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200 N
you push on the wall and the wall pushes back on you with opposite and equal force.
The reaction force is not infinite; it is finite. For example, if you push with a force of 100N, the wall will push back with a force of 100N.If you are thinking that this requires an unlimited amount of energy, then you are confusing the concepts of force and energy. Energy is only required if the force is applied over a certain distance - the energy (or work) required to pull or push an object is equal to the force multiplied by the distance. In the example you give, the wall doesn't budge, so you have a force of 100 N times a distance of zero meters, equals an energy of 0 Joule.
40 newtons
depends on the wall.
200 N
you push on the wall and the wall pushes back on you with opposite and equal force.
It pushes back with an equal force (10 N). If it can not, then it falls over.
The reaction force is not infinite; it is finite. For example, if you push with a force of 100N, the wall will push back with a force of 100N.If you are thinking that this requires an unlimited amount of energy, then you are confusing the concepts of force and energy. Energy is only required if the force is applied over a certain distance - the energy (or work) required to pull or push an object is equal to the force multiplied by the distance. In the example you give, the wall doesn't budge, so you have a force of 100 N times a distance of zero meters, equals an energy of 0 Joule.
40 newtons
depends on the wall.
This is newtons third law in action, which states that for every action there is an equal and opposite reaction. If you push on a wall with 50 newtons of force, the wall will not move, and it will have no acceleration. To make the sum of the forces zero, the wall must push back on you with the same 50 newton force. This is implying that you do not push on the wall hard enough to were it breaks. If it does this it means you are overcoming the force that the wall can push back.
bumper cars, hockey puck, rocket launch, swimming, rowing in a boat. for example if you run into a wall and you use force on hitting it, the wall will use the same force to push you back, that why you bounce off the wall with the same force as you hit it.
The force that is stronger will overwhelm the other force and the other force will lose it's power and the vector becomes 0. Later the object gets moved or breaks. it's Shown by this formula which Newton made called F=-F. Lets say that you are pushing a wall. You are pushing the wall, but the wall pushes back as the same force as you, but if you push stronger than the maximum force of the wall, the wall breaks or moves.
inertia
inertia
It is the force of the wall pushing against your fingers. This is related to Newton's Third Law.