Question | Answer |
speed | Distance / time |
acceleration | v-u/time |
weight | Mass x gravitational field strength |
force (Newton 2nd Law) | Mass x acceleration |
Stopping distance | Braking distance + thinking distance |
force acting | Change in momentum/time taken for change |
momentum | Mass x velocity |
moment | Force x distance perpendicular between line of action and pivot |
Total anticlockwise moments | Total clockwise moments |
force (Hooke's Law) | Spring constant x extension |
Circular motion | Velocity2/radius |
Orbital speed | 2(pie)r/time |
Electrical power | Current x voltage |
Energy transferred | Current x voltage x time |
voltage | Current x resistance |
charge | Current x time |
speed | Frequency x wavelength |
frequency | 1/time |
Angle of incidence | Angle of reflection |
Refractive index (n) (without i or r) | speed of light in vacuum/speed of light in material |
Refractive index (n) | Sin(i)/sin(r) |
sin(critical angle) | 1/refractive index |
efficiency | Useful energy output/total energy input |
Work done | force x distance moved |
power | Work done/time taken |
Kinetic energy | 1/2 x mass x velocity2 |
Gravitational potential energy | Mass x gravity x height |
KE gained | GPE lost |
density | Mass/volume |
pressure | force/area |
Pressure in liquids and gases | Density x gravity x height |
pressure1 x volume1 | Pressure2 x volume2 Charle's Law |
pressure1/temperature1 | pressure2/temperature2 Boyle's Law |
(pressure1 x volume1)/temperature1 | (pressure2 x volume2)/temperature2 Gas Law |
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