F;ashcards for A-level OCR Physics
| Front | moment of a force |
| Back | force × perpendicular distance from the point / pivot |
| Front | conservation of charge |
| Back | Electric charge can neither be created nor destroyed. |
| Front | instantaneous speed |
| Back | the speed at the precise instant that it is measured (e.g. a reading on the car's speedometer). Calculated as the gradient of a tangent to the point on a distance-time graph |