AS Definitions Flashcards
Power
Amount of energy transferred or converted per unit time.
Gravitational Potential
The amount of work done in order to raise the body to a certain height.
Displacement
Vector quantity measuring straight-line distance from two points and its direction.
Acceleration
Rate of change of velocity.
Potential Difference
The potential difference between two points in an electrical circuit is the electrical energy converted into other forms of energy per unit charge passing from one point to the other.
Coherence (waves)
Two wave sources are perfectly coherent if their frequency and waveform are identical and their phase difference is constant.
Phase Difference
Tells us how much a particle (or wave) is in front or behind another particle (or wave).
Path Difference
Difference in distance traveled by the two waves from their respective sources to a given point on the pattern.
Newton’s Third Law
If body A exerts a force on body B, then body B exerts a force of equal magnitude but in the opposite direction on body A.
One Coulomb
One coulomb is the quantity of electricity transported in one second by a current of one ampere
Kinetic Energy
The kinetic energy of an object is the energy that it possesses due to its motion.
Principle of Moments
The Principle of Moments states that when a body is balanced, the total clockwise moment about a point equals the total anticlockwise moment about the same point. Moment =force F x perpendicular distance from the pivot d.
Stationary Wave
When two coherent waves are reflected on each other to create nodes and antinodes.
Transverse Wave
Transverse waves are waves in which the displacement of the particles is perpendicular to the direction of propagation of energy of the waves.
Longitudinal Wave
Longitudinal waves are waves in which the displacement of the particles is in the same direction / plane to the direction of propagation of energy of the wave.
