1. The Law of Inertia:
- An object at rest will remain at rest, and an object in motion will remain in motion at constant speed and in a straight line unless acted upon by an external force.
2. The Law of Acceleration:
- The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.
- Mathematically, it can be expressed as:
```
F = ma
```
where:
- F is the net force acting on the object (measured in newtons, N)
- m is the mass of the object (measured in kilograms, kg)
- a is the acceleration of the object (measured in meters per second squared, m/s²)
3. The Law of Action and Reaction:
- For every action, there is an equal and opposite reaction.
- In other words, when one object exerts a force on a second object, the second object exerts a force of equal magnitude but opposite direction on the first object.