![]() ![]() This example of newton’s third law is also an example of balanced forces. You can understand this example by imagining if someone is to rest on you then you have to apply some force to support the other person. Resting against a wall or tree: When we rest against a tree or a wall, we get a reaction force from the tree or the wall in order to support us. That is why you feel pain after slapping someone or punching a wall. But we also a get a force onto our hands and legs as a reaction force. Punching an object: When we punch an object or kick something, the object may break due to our force which is an action. Here the direction in which we pull is also important as that will determine the direction in which the object will travel. ![]() And when we release the slingshot we get an equal and opposite force that is able to propel the object. Slingshot: When we pull a slingshot the energy gets stored in the elastic material. ![]() The action here is our body weight and the reaction force is a force from the ground to support us. But there is actually a reaction force from the ground which counters the weight of our body. Standing on the ground or sitting on a chair: Whenever we stand or sit or lie on the ground we feel nothing. You can read our blog on friction as a necessary evil to know more about this.Īction-reaction forces, while we walk, is an example of Newton’s third law In essence, if there was no friction then we could not walk. Walking: While we walk we apply a force in the backward direction, and in response, the friction provides an equal and opposite force which helps us to move forward. This force is self-adjusting, so it adjusts itself to be equal and opposite to applied force. This static friction force helps it to resist your force and stay in place. There is actually a reaction force supplied by the rock in the static friction. There is no reaction force for the force applied to it. When we push a heavy object say a rock, nothing happens. Let us take the example of static friction in which it looks like newton’s third law is not followed. Static friction while pushing an object: Sometimes when you apply a force nothing happens. Rowing is an example of Newton’s third law of motion. The more you push back the more you move forwards. The generated in the backward direction gives an and opposite reaction in the forward direction. Swimming or rowing a boat: When swim or move in a roving boat, you have to push the water backward in order to move forward. The action (applied force) is stored as energy and is released as a reaction with an equal and opposite force. This is the same when you pull or compress a spring. The more you pull the more force it generates. Pulling an elastic band: When we pull an elastic band, it automatically returns to its original position. Let us discuss each of the examples in detail and see how they are consistent with Newton’s third law of motion. Pushing someone or pushing something we tend to move backward.When you run on a carpet, it moves backward.Standing on the ground or sitting on a chair.Static friction while pushing an object. ![]()
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