| A | B |
|---|
| Impulse | Equal to the change in momentum of an object. Can be calculated by multiplying the average force acting by the time taken |
| Centre of Mass | The point where the total mass of an object (or objects) appears to act |
| Velocity of Centre of Mass | Can be calculated by dividing the total momentum by the total mass |
| Angular Displacement | The angle turned through by an object as it rotates |
| Angular Velocity | The rate of change of angular dispalcement (The angle turned through every second) by a rotating object |
| Angular Acceleration | The rate of change of angular velocity (The change in angular velocity every second) |
| Rotational Inertia | A measure of how hard it is to start or stop an object rotating (Depends on mass and mass distribution) |
| Rotational Kinetic Energy | Energy possessed by a rotating object |
| Angular Momentum | The product of rotational inertia times angular velocity |
| Torque | The turning effect of a force |
| Natural Frequency | The frequency of SHM if the system is allowed to oscillate freely |
| Resistivity | A quantity which compares the resistance of different materials |
| Magnetic Flux | Magnetic field strength (in Telsa) through each square metre |
| Capacitance | Charge stored (in Coulombs) on the plates of a capacitor per volt across the plates |
| Inductance | The voltage induced across an inductor as the current changes by 1 amp per second |
| Reactance | The ability of a capacitor or inductor to limit the size of the current in an AC circuit |
| Impedance | The combined effect of resistance and reactance to limit the current in an AC circuit |
| Velocity | Speed in a given direction |
| Acceleration | The rate at which an object changes its velocity |
| Acceleration caused by gravity | The rate at which object s change their velocity when acted on by gravity |
| Force | A push or pull in a particular direction |
| Centripetal Force | A force that turns an object (It is directed towards the centre of the circle or curve) |
| Spring Constant | The force required to extend (or compress) a springby 1m |
| Linear Momentum | The product of mass times velocity |
| Energy | The capacity to do work |
| Frequency | The number of cycles per second |
| Period | Time taken for one complete cycle |
| Amplitude | Distance from equilibrium position to the maximum point (half the maximum displacement) |
| Wavelength | Distance in a wave from one point to the next repetition of that point |
| Current | Charge flowing (in Coulombs) per second |
| Voltage | Energy difference per coulomb of charge between two points |
| EMF | Voltage of a battery when no current is flowing |
| Resistance | A measure of how well a material conducts electricity |
| Internal Resistance | Resistance of a power source |
| Magnetic Field Strength | The size of the magnetic force acting in an area |
| Work | Energy transferred |
| Power | Energy transferred per second |
| Refractive Index | A comparison of the speed of light in different mediums (large refractive idex = slow speed) |
| Work Function | Minimum energy needed by an electron to escape the surface of a particular metal |
