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Physics: Forces and Newton's 3 Laws of Motion
Forces and the Laws of Motion
Terms in this set (23)
The cause of a change in acceleration, or the change in an object's motion
A force that arises from the physical contact of two objects.
A force that can exist between objects, even in the absence of physical contact between the objects.
A diagram of the objects involved in a situation and the forces exerted on the objects.
The tendency of an object to maintain its state of motion.
Net External Force
The total force resulting from a combination of external forces on an object; sometimes called the resultant force.
The state of a body in which there is no change in its motion.
Action - Reaction Pair
A pair of simultaneous equal but opposite forces resulting from the interaction of two objects.
The magnitude of the force of gravity acting on an object.
A contact force exerted by one object on another in a direction perpendicular to the surface of contact.
The force exerted on a motionless body by its environment to resist an external force.
The force exerted on a moving object.
Coefficient of Friction
The ratio of the force of friction to the normal force acting between two objects.
Newton's 1st Law of Motion
An object at rest remains at rest, and an object in motion continues in motion with constant velocity unless it experiences a net external force.
Newton's 2nd Law of Motion
Force = mass x acceleration
F = ma
Newton's 3rd Law
Every action has an equal and opposite reaction.
Fn (written with the n as a subscript)
Normal force which is the force that works opposite to gravity.
Fg (written with the g as a subscript)
Force of acceleration of gravity.
It has a numerical value of 9.8 m/s²
Fa (written with the a as a subscript)
The force that is being exerted on an object and making it move.
Ff (written with the f as a subscript)
The frictional force which is always working against Fa
A unit of force in the SI system. It is equal to a kilogram being accelerated at a rate of 1 m/s²
The unit of force (not mass) in the English system.
A unit of force in the SI system smaller than a Newton.
A dyne = g times cm/s²
THIS SET IS OFTEN IN FOLDERS WITH...
Physics Sections 2.1/ 2.2: Scalar & Vect…
NTK Physics Formula - All
Physics Unit 2 (p) - Newton's Laws
Newton's Laws of Motion
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