How do the three laws apply in various situations?
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Watch the above video from about 0:11 to 0:57. How are each of Newton's laws of motion affecting the blocks?
At the beginning, the two blocks are motionless (at rest). Only until one of them collides into the other, transferring its velocity, it is at rest.
This shows Newton's first law; “An object at rest stays at rest and an object in motion stays in motion until an external unbalanced force is applied.”
Newton's second law; “F=MA” , or in other terms, mass, acceleration, and force are all related.
More specifically, acceleration is directly proportional to force and inversely proportional to mass.
If they weren't related, then the blocks wouldn't be able to transfer velocity (apply force).
When the object bounces off the wall, it shows Newton's third law; “For every action there is an equal and opposite reaction.”
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Imagine that there is a rocket launch. How do each of Newton's laws affect the rocket?
Prior to the launch, the rocket will remain motionless until it ignites the fuel and takes off.
This shows Newton's first law, "An object will stay at rest or in motion until an external, unbalanced force is applied on it."
The rocket will remain motionless because there is no external, unbalanced force acting on it.
Since mass, force, and acceleration are all related (F=MA), as the rocket burns fuel and gets lighter, it will get faster because of this.
This is how Newton's second law applies to this scenario.
Newton's third law is the key reason why rockets can propel at all. In this case,
the action is the fuel burning out of the exhaust. The "equal" reaction is the
exhaust gases going down. The "opposite" is the rocket moving upwards.
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The two situations above are both fairly theoretical, but if you want something less theoretical, just look around you and observe!
The peers in your room, a book on a table, a person leaning against a wall, etc. Try to come up with how each law is being used!
For example, a book on a table shows Newton's first law of motion since it is at rest until you pick it up.