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| 14352682414 | weight | force a body exerts due to the pull of gravity | 0 | |
| 14352682415 | mass | the measure of the amount of material in a body | 1 | |
| 14352682416 | momentum= | mass x velocity | 2 | |
| 14352682421 | density is | mass per unit volume | 3 | |
| 14352682422 | density= | mass/volume | 4 | |
| 14352682424 | friction is | a force that opposes motion | 5 | |
| 14352682425 | air resistance or drag | occurs when the object moves through air or fluid | 6 | |
| 14352682426 | reduce friction by | lubrication | 7 | |
| 14352682427 | friction acts in the | opposite direction of the motion of object | 8 | |
| 14352682433 | 1st law | a body will remain at rest or move at a constant velocity if the resultant force acting on the body is zero | 9 | |
| 14352682434 | balanced forces exist when | two forces act in opposite directions but are the same size | 10 | |
| 14352682435 | 2nd law | if a resultant force acts on a body the body will not remain at rest or move at constant velocity, it will accelerate | 11 | |
| 14352682436 | resultant force= | mass x acceleration | 12 | |
| 14352682438 | distance is | the total amount of ground covered | 13 | |
| 14352682439 | displacement is | shortest distance from start to finish in a certain direction | 14 | |
| 14352682440 | speed is | rate of change of distance | 15 | |
| 14352682441 | velocity is | rate of change in displacement | 16 | |
| 14352682442 | acceleration is | rate of change in velocity | 17 | |
| 14352682443 | scalar | has magnitude only | 18 | |
| 14352682444 | vector | magnitude and direction | 19 | |
| 14352682445 | acceleration= | velocity/time | 20 | |
| 14352682446 | unit of acceleration | m/s² | 21 | |
| 14352682447 | Work = | force x distance | 22 | |
| 14352682448 | unit of work | newton meter | 23 | |
| 14352682451 | centrepedal force depends on | mass of object speed of object radius of circle | 24 | |
| 14352682453 | unit of momentum | kgm/s² | 25 | |
| 14352682454 | change in momentum= | force x time | 26 | |
| 14352682455 | momentum depends on | mass velocity | 27 | |
| 14352682457 | conservation of momentum | when two bodies collide, the total momentum remains constant, providing that there are no external forces acting | 28 | |
| 14352682458 | energy types | kinetic light sound EPE GPE chemical electrical nuclear magnetic heat | 29 | |
| 14352682466 | GPE | the type of energy anything above the ground has | 30 | |
| 14352682468 | nuclear | energy stored inside nucleus due to its missing mass | 31 | |
| 14352682469 | unit of energy | joules | 32 | |
| 14352682472 | formula for kinetic energy= | ½mv² | 33 | |
| 14352682473 | principle of energy | energy cannot be created or destroyed, only changed into different forms | 34 | |
| 14352682474 | power | rate at which work is done or energy is transferred | 35 | |
| 14352682475 | power= | work done/time | 36 | |
| 14352682497 | JJ Thompson | plum pudding model a sphere of positive charge with tiny negative electrons stuck in it | 37 | |
| 14352682498 | Rutherford | fired positively charged alpha particles at a thin gold foil most alpha particles went straight through with no or little deflection some were deflected through very large angles and a few came straight back introduced nucleus | 38 | |
| 14352682500 | Bohr | introduced the idea of electrons orbiting a nucleus un discrete energy levels, by studying the emission spectra of gases | 39 | |
| 14352682502 | alpha α ⁴ He ₂ | helium nucleus positively charged deflected by magnetic field | 40 | |
| 14352682507 | nuclear fission | This is when heavy nuclei can be forced to split into two lighter nuclei | 41 | |
| 14352682513 | nuclear fussion | this is when two lighter nuclei combine to form a single heavier nucleus | 42 | |
| 14352682517 | if light enters or leaves a different material, of different optical density | the speed of light changes and therefore the direction of travel changes | 43 | |
| 14352682518 | light travels in | straight lines | 44 | |
| 14352682519 | light speed in vacuum | 300000km/s | 45 | |
| 14352682520 | dispersion | spreading out of white light into its separate colours | 46 | |
| 14352682522 | conditions of total internal refraction | light must be travelling from a more optically dense material to a less optically dense material angle of incidence is greater than the critical angle for the given material |  | 47 |
| 14352682530 | waves are produced | by vibrations | 48 | |
| 14352682531 | waves | transfer energy from one point to another in the direction in which the wave is travelling, without the movement of material as a whole | 49 | |
| 14352682532 | transverse waves | direction of travel of the wave is perpendicular to the direction of vibrations e.g. mexican wave | 50 | |
| 14352682533 | longitudinal wave | direction of travel of the wave is parallel to the direction of vibration e.g. audible sound | 51 | |
| 14352682534 | amplitude A | the maximum displacement from the equilibrium position | 52 | |
| 14352682535 | period T | time taken for one complete vibration | 53 | |
| 14352682536 | wavelength λ | distance between two neighbouring crest/troughs or compression/rarefactions | 54 | |
| 14352682537 | frequency F | number of complete vibrations occurring in one second | 55 | |
| 14352682538 | period= | 1/frequency | 56 | |
| 14352682539 | wave speed= | frequency x wavelength | 57 | |
| 14352682540 | when waves are reflected the | speed frequency and wavelength fo not change | 58 | |
| 14352682541 | when waves are refracted the | frequency does not change | 59 | |
| 14352682542 | electromagnetic spectrum | group of waves that all have the same speed | 60 | |
| 14352682560 | average velocity= | total displacement/total time | 61 | |
| 14352682561 | net force= | mass x acceleration | 62 | |
| 14352682562 | GPE= | mgh | 63 | |
| 14352682563 | Electric Field lines point | away from positive charges | 64 | |
| 14352742867 | Gravitation force is related to distance | inverse square | 65 | |
| 14352745200 | Relationship between current and resistance | inverse | 66 | |
| 14352747454 | Relationship between voltage and current | direct | 67 | |
| 14352749018 | Relationship between mass and centripetal acceleration | none | 68 | |
| 14352750791 | relationship. between speed and kinetic energy | exponential | 69 | |
| 14352753051 | relationship between force and change in spring length | direct | 70 | |
| 14352754629 | relationship between PEs and change in spring length | exponential | 71 |
