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• Coulomb's Law: The magnitude of the electrostatic force exerted by two point charges (Q1 and Q2) on each other is directly proportional to the product of the magnitudes of the charges and inversely proportional to the square of the distance (r) between them.
• Resultant: The vector sum of two or more vectors, i.e., a single vector having the same effect as two or more vectors together.
• Normal Force (N): The force or the component of a force which a surface exerts on an object in contact with it, and which is perpendicular to the surface.
• Frictional Force (f): The force that opposes the motion of an object and acts parallel to the surface.
• Static Frictional Force (fs): The force that opposes the tendency of motion of a stationary object relative to a surface.
• Kinetic Frictional Force (fk): The force that opposes the motion of a moving object relative to a surface.
• Newton's First Law of Motion: A body will remain in its state of rest or motion at constant velocity unless a non-zero resultant/net force acts on it.
• Inertia: The resistance of an object to any change in its state of motion, the mass of an object is a quantitative measure of its inertia.
• Newton's Second Law of Motion: When a resultant/net force acts on an object, the object will accelerate in the direction of the force at an acceleration directly proportional to the force and inversely proportional to the mass of the object.
• Newton's Third Law of Motion: When object A exerts a force on object B, object B simultaneously exerts an oppositely directed force of equal magnitude on object A.
• Newton's Law of Universal Gravitation: Each particle in the universe attracts every other particle with a gravitational force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.
• Weight: The gravitational force, in newton (N), exerted by the Earth on an object.
• Mass: The amount of matter in a body measured in kilogram (kg).
• Newton's First Law of Motion: An object will remain at rest or constant velocity unless acted upon by a non-zero/net resultant force.