AS Definitions Flashcards
Linear momentum
Product of mass and acceleration of the body
Force
Rate of change of momentum
Moment of a force
Product of force and its perpendicular distance from a point
Torque of a couple
Product of one of the forces of a couple and the distance of separation of the forces
Density
Mass per unit volume
Pressure
Force per unit perpendicular area
Mass
Quantity of matter in a body
Centre of gravity
Point where all the weight of the body is take to act
Distance
Change of position from a fixed point
Displacement
Change of position from a fixed point in a straight line
Speed
Distance covered per unit time in any direction
Velocity
Change of displacement per unit time
Acceleration
Rate of change of velocity
Work done
The product of force and distance moved in the direction of the force
Kinetic energy
Energy of body due to its motion
Elastic potential energy
Energy stored in an object due to change of shape
Power
Work done per unit time
Stress
Force per unit cross-sectional area
Strain
Extension unit original length
Young Modulus
Stress per unit strain
Diffraction
Spreading of waves into geometrical shaped when incident on a gap
Wavelenth
Distance between two adjacent water fronts
Wave displacement
Distance in a specified direction of particle from the equilibrium position
Period
Time for one oscillation
Amplitude
Maximum displacement of particles
Coherence
Waves with constant phase difference
Transverse waves
Wave with displacement of particles perpendicular to the direction of energy propagation
Longitudinal waves
Wave with displacement of particles parallel to the direction of energy propagation
Doppler effect
Change in observed frequency due to a source moving relative to an observer
Antinode
Position in a stationary wave where the amplitude is maximum
Potential difference (p.d)
Energy transferred from electrical to other forms per unit charge
Electromotive force (e.m.f)
Energy transferred from other forms to electrical energy per unit charge
Resistance
Potential difference per unit current
Ohm
Volt per unit ampere
Electric current
Charge per unit time
Ampere
Coulomb per unit second
Volt
Joule per coulomb