8626728
Description
Flashcards by Annalise Glover, updated more than 1 year ago
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Created by Annalise Glover
over 7 years ago
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| Question | Answer |
| Weight = | mass x gravitational field strength w = m x g |
| Work done = | force x distance w = f x d |
| force applied to a string = | spring constant x extension f = k x e |
| moment of a force = | force x distance m = f x d |
| pressure = | force normal to a surface ----------------------------------------- area of that surface P = f / a |
| distance travelled = | speed x time d = s x t |
| acceleration = | change in velocity -------------------------------- time taken a = Δ v / t |
| resultant force = | mass x acceleration f = m x a |
| momentum = | mass x velocity p = m x v |
| kinetic energy | 0.5 x mass x (velocity)² Ek = 1/2 x m x v² |
| gravitational potential energy = | mass x gravitational field strength x height Ep = m x g x h |
| elastic potential energy = | 1/2 x spring constant x extension² Ee = 1/2 x k x e² |
| power = | energy transferred -------------------------------- time p = e / t |
| power = | work done -------------------- time p = w / t |
| efficiency = | useful output energy transfer ----------------------------------------------- total input energy transfer |
| efficiency = | useful power out -------------------------- total power in |
| wave speed = | frequency x wavelength v = f x λ |
| charge flow = | current x time q = I x t |
| current = | potential difference x resistance v = I x r |
| Ohms law | the current through a resistor at a constant temperature is directly proportional to the potential difference across the resistor |
| power = | potential difference x current p = v x i |
| power = | (current)² x resistance p = I² x r |
| energy transferred = | power x time e = p x t |
| energy transferred = | charge flow x potential difference e = q x v |
| density = | mass ------------------ volume p = m / v |
| specific heat capacity definition | The specific heat capacity of a substance is the energy needed to raise the temperature of 1 kg of a substance by 1°C |
| potential difference definition | potential difference is energy that each coulomb of charge transfers from the battery to the components in the circuit. |
| frequency = | 1 ------------------------- period (seconds) |
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