Newton's 3 Laws

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by Wh1tExN1NjA
Last updated 5 years ago

Discipline:
Science
Subject:
Forces & Motion
Grade:
9

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Newton's 3 Laws

Newton's Three Laws

1st Law

Sir Issac NewtonSir Isaac Newton was an English physicist and mathematician who is widely recognised as one of the most influential scientists of all time and as a key figure in the scientific revolution.

2nd Law

3rd Law

F=MV

For every action there is an equal and opposite reaction.

An object in motion/ at rest will stay in motion/ at rest unless acted upon by an outside force.

1st Law- The behavior of all objects can be described by saying that objects tend to "keep on doing what they're doing" (unless acted upon by an unbalanced force). If at rest, they will continue in this same state of rest. If in motion with an eastward velocity of 5 m/s, they will continue in this same state of motion (5 m/s, East). If in motion with a leftward velocity of 2 m/s, they will continue in this same state of motion (2 m/s, left). The state of motion of an object is maintained as long as the object is not acted upon by an unbalanced force. All objects resist changes in their state of motion - they tend to "keep on doing what they're doing."

2nd Law- it means that the heavier a body is, the more force is needed to move it. While, the faster the body moves, the more force is needed to stop it. Force is directly proportional to both mass and acceleration. As either mass or acceleration increases, force also increases.

3rd Law- When you sit in your chair, your body exerts a downward force on the chair and the chair exerts an upward force on your body. There are two forces resulting from this interaction - a force on the chair and a force on your body. These two forces are called action and reaction forces and are the subject of Newton's third law of motion.


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