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Phys P1 Definitions

Definitons for paper 1

TermDefinition
Displacement A change in position
Velocity The rate of change of position/ or the rate of displacement/ or the rate of change of displacement/ and know that velocity is a vector quantity
Acceleration The rate of change of velocity
Newton’s First Law An object continues in a state of rest or uniform velocity/ unless it is acted upon/ by a net or resultant force
Newton’s Second Law When a net force (Fnet) is applied to an object of mass (m) it accelerates in the direction go the net force. The acceleration (a) is directly proportional to the net force and inversely proportional to the mass
Newtons’s Third Law When object A exerts a force on object B, object B simultaneously exerts an oppositely directed force of equal magnitude on object A
Friction(Ffr) The force that opposes the motion of an object and acts parallel to the surface with which the object is in contact
Weight(Fg) The gravitational force the Earth exerts on any object or near its surface
Electric Current(I) The rate of flow of charge (I = q/t)
Coulomb’s Law Two point charges in free space or air exert forces on each other. The force is directly proportional to the product of the charges and inversely proportional to the square of the distance between the charges.
Resistance A material’s opposition to the flow of electric current
Law of Conservation of Charge Charge is neither created or destroyed. It can only be transferred from one system to another
Magnitude of Electric field at a point The force per unit positive charge (E = F/q)
Electric Field A region of space in which an electric charge experiences a force. The direction of the electric field at a point is the direction that a positive test charge would move if placed at a point
Lenz Law The induced current flows in the direction so as to set up a magnetic field to oppose the change in magnetic flux
Faraday’s Law The emf induced is directly proportional to the rate of change of magnetic flux (flux linkage)
Created by: khayad
 

 



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