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| Question | Answer |
| What is the equation for Kinetic energy? What unit is energy measured in? | K.E = 1/2 x mass x speed^2 joules (J) |
| What is the equation for GPE? What does GPE stand for? | GPE = mass x g X height GPE is gravitational potential energy |
| What are the two equations for power? | power = work done / time taken power = Energy transferred / time taken |
| What is efficiency in terms of power? | Useful power output / total power input |
| What is efficiency in terms of energy transfer? | useful energy output / total energy input |
| What is the equation for charge flow? | Charge flow = current x time Q = It |
| What is Ohm's law? (Equation for potential difference) | Potential difference = Current x resistance V=IR |
| What is the total resistance of two resistors R1 and R2 in series? | total resistance (series) = R1 + R2 |
| What is the total resistors of two resistors R1 and R2 in parallel? | total resistance (parallel) 1/R = 1/R1 + 1/R2 |
| What is electrical power in terms of potential difference? | Power = potential difference x current P=IV |
| What is electrical power in terms of resistance and current? | Power = current^2 x resistance P=I^2 R |
| What is energy transferred in terms of power? | Energy transferred = power x time E=Pt |
| What is energy transferred in terms of charge flow? | energy transferred = charge flow x potential difference E=QV |
| What is the equation for density? | Density = mass / volume ⍴ = m/V |
| What is the equation for wave speed? | Wave speed = frequency x wavelength v = f λ |
| What is the equation for weight? | Weight = mass x gravitational field strength W = mg |
| What is the equation for work done? | Work done = force x distance (along line of action of the force) W = Fs |
| What is Hooke's law? (Force on an extended spring | Force = extension x spring constant F = k e |
| What is the equation for the moment of a force? | moment = force x perpendicular distance M = Fd |
| What is the equation for pressure? | force normal to surface/ surface area P =F/A |
| What is the equation for distance travelled? | distance = speed x time s = vt |
| What is the equation for acceleration? | (final velocity-initial velocity)/time taken a = (v-u)/t Change in velocity / time taken a = Δv/t |
| What is the equation for resultant force? | Mass x acceleration F = ma |
| What is the equation for momentum? | mass x velocity p = mv |
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