Lesson 3_ Newton's Laws of Motion (1)

Newton's First Law of Motion

An object at rest will remain at rest, or an object moving at a constant velocity will continue moving at a constant velocity unless acted upon by a non-zero net force.

Inertia

An object's ability to resist changes in motion; the tendency of an object to continue moving in a straight line at the same speed unless acted upon by a force.

Newton's Second Law of Motion

An object's acceleration depends on its mass and on the net force acting on it.

Net Force Formula

Net force = Mass x Acceleration.

Newton's Third Law of Motion

For every action, there is an equal in strength but opposite in direction reaction.

Balanced Forces

Forces that act on the same object and are equal in size and opposite in direction, resulting in no change in motion.

Action-Reaction Forces

Forces that act on different objects where one object's action creates a reaction force on another object.

Friction

A force that opposes the motion of an object, causing it to slow down or change direction.

Mass

The amount of matter in an object, which affects how it accelerates under a given force.

Acceleration

The rate of change of velocity of an object, dependent on the net force and mass acting on it.