Newton's Laws of Motion

1. Newton's First Law of Motion

Newton's First Law of Motion, also known as the law of inertia, states that an object at rest will stay at rest, and an object in motion will stay in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

In other words, an object will not change its state of motion unless a force is applied to it.

2. Newton's Second Law of Motion

Newton's Second Law of Motion states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. This can be mathematically expressed as:

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Where:
F = Net force acting on the object
m = Mass of the object
a = Acceleration of the object

This law essentially explains how the velocity of an object changes when it is subjected to an external force.

3. Newton's Third Law of Motion

Newton's Third Law of Motion states that for every action, there is an equal and opposite reaction. This means that when one object exerts a force on a second object, the second object exerts a force of equal magnitude in the opposite direction on the first object.

This law explains why we can walk, swim, or drive. Our feet push against the ground, our hands push against the water, and the tires of a car push against the road, resulting in motion in the opposite direction.

Study Guide for Newton's Laws of Motion

1. What is Newton's First Law of Motion also known as?
2. What does Newton's Second Law of Motion state?
3. How is Newton's Second Law of Motion mathematically expressed?
4. What is Newton's Third Law of Motion?
5. Provide an example that illustrates Newton's Third Law of Motion.