Physics Definitions Flashcards
Vector
Physical quantity
Has magnitude
And direction
Scalar
Physical quantity
Magnitude only
Resultant vector
Single vector
Sane effect as original vectors acting together
Distance
Length of path travelled
Scalar
Speed
Rate of change of distance
Scalar
Displacement
Change in position
Velocity
Rate of change of displacement
Vector
Acceleration
Rate of change of velocity
Vector
Work done on an obj by force
Product of displacement and component of force parallel to displacement
W=FXcos
Gravitational potential energy
Energy obj possess due to its position
Relative to a reference point
Kinetic energy
Energy obj has
Due to its motion
Mechanical energy
Sum of
Gravitational potential energy
Kinetic energy
At a point
Law of conservation of energy
Total energy in a system cant be created or destroyed
Only transformed
Principle of conservation of mechanical energy
M.E of obj is constant
In absence of external forces
Net force
Work dont by NF is equal to the change in kinetic energy of obj
W=Fnet.s=EK
Potential difference
Work done per unit positive charge
Current
Rate of flow of charge
Ohms law
Current through a conductor is directly proportional to potential difference across the conduct
If it is at a constant temperature
Resistance
Materials opposition to flow of electric current
EMF
Total energy supplied per coulomb of charge by the cell
Transverse wave
Vibrating source moves in a direction perpendicular to the propagation of the wave
Amplitude
Maximum displacement of particles
From rest position
In phase
Move simultaneously in same direction and same speed as one another
Wavelength
Distance between two consecutive points
In phase
Period
Time taken for one complete wave to pass a point
Frequency
Number of complete waves that pass a point in one second
Electromagnetic waves produced
Accelerating charge form changing electric and magnetic fields and propagates at 90
