Newton's Laws of Motion

Study Notes

An object at rest remains at rest, and an object in motion remains in motion, unless acted upon by an external force.
Inertia is the tendency of an object to resist changes in its motion.
Net force = 0 → no change in motion

Force (F) is equal to the mass (m) of an object multiplied by its acceleration (a).
F = ma
The more massive an object, the more force is required to produce a given acceleration.
The greater the acceleration, the greater the force required.

For every action, there is an equal and opposite reaction.
When two objects interact, the force exerted by one object on the other is equal in magnitude and opposite in direction.
Examples: throwing a ball, pushing a box, etc.

Predicting the motion of objects under the influence of forces.
Designing and optimizing systems, such as vehicles, machines, and projectiles.
Understanding the behavior of objects in various environments, such as frictionless surfaces, inclined planes, and circular motion.

An object at rest will remain at rest, and an object in motion will continue to move, unless acted upon by an external force.
Inertia is the tendency of an object to resist changes in its motion.
If the net force is zero, there will be no change in motion.

Force (F) is equal to the mass (m) of an object multiplied by its acceleration (a).
The formula for the second law is F = ma.
The more massive an object is, the more force is required to produce a given acceleration.
The greater the acceleration, the greater the force required.

For every action, there is an equal and opposite reaction.
When two objects interact, the force exerted by one object on the other is equal in magnitude and opposite in direction.
Examples of the third law include throwing a ball, pushing a box, and other interactions between objects.

Newton's laws can be used to predict the motion of objects under the influence of forces.
The laws are used to design and optimize systems, such as vehicles, machines, and projectiles.
Understanding Newton's laws helps us understand the behavior of objects in various environments, such as frictionless surfaces, inclined planes, and circular motion.

An object at rest will remain at rest, and an object in motion will continue to move with a constant velocity, unless acted upon by an external force.
Inertia is the tendency of an object to resist changes in its motion.
Examples of inertia in action:
- A car will keep moving in a straight line unless friction or another force slows it down.
- A bowling ball will keep rolling unless friction or a force from the lane stops it.

The acceleration of an object is directly proportional to the force applied and inversely proportional to its mass.
The mathematical representation of the Second Law: F = ma, where F is the net force acting on an object, m is its mass, and a is its acceleration.
Examples of the Second Law:
- The more massive an object, the less it will accelerate when a given force is applied.
- The greater the force applied, the greater the acceleration of an object.

Every action has an equal and opposite reaction.
When object A exerts a force on object B, object B always exerts an equal and opposite force on object A.
Examples of the Third Law:
- When you push on a wall, the wall pushes back on you with the same force.
- When a car accelerates forward, the ground exerts an equal force backward on the car.

Force is a push or pull that causes an object to change its motion.
Mass is a measure of the amount of matter in an object, which determines its resistance to changes in motion.
Acceleration is the rate of change of velocity.
Velocity is the speed of an object in a specific direction.