Physics equations

• What is the formula for kinetic energy?

  Kinetic energy = $0.5 \times \text{mass} \times (\text{speed})^2$
• What is the formula for elastic potential energy?

  Elastic potential energy = $0.5 \times \text{spring constant} \times (\text{extension})$
• What is the formula for gravitational potential energy?

  Gravitational potential energy = $\text{mass} \times \text{gravitational field strength} \times \text{height}$
• What is the formula for change in thermal energy?

  Change in thermal energy = $\text{mass} \times \text{specific heat capacity} \times \text{temperature change}$
• What is the formula for power?

  Power = $\frac{\text{energy transferred}}{\text{time}}$
• What is another formula for power?

  Power = $\frac{\text{work done}}{\text{time}}$
• What is the formula for efficiency?

  Efficiency = $\frac{\text{useful output energy transfer}}{\text{total input energy transfer}}$
• What is another formula for efficiency?

  Efficiency = $\frac{\text{useful power output}}{\text{total power input}}$
• What is the formula for charge flow?

  Charge flow = $\text{current} \times \text{time}$
• What is the formula for potential difference?

  Potential difference = $\text{current} \times \text{resistance}$
• What is the formula for power in terms of potential difference and current?

  Power = $\text{potential difference} \times \text{current}$
• What is another formula for power in terms of current and resistance?

  Power = $(\text{current})^2 \times \text{resistance}$
• What is the formula for energy transferred?

  Energy transferred = $\text{power} \times \text{time}$
• What is the formula for energy transferred in terms of charge flow and potential difference?

  Energy transferred = $\text{charge flow} \times \text{potential difference}$
• What is the relationship between potential difference and current in a transformer?

  Potential difference across primary coil x current in primary coil = potential difference across secondary coil x current in secondary coil
• What is the formula for density?

  Density = $\frac{\text{mass}}{\text{volume}}$
• What is the formula for thermal energy for a change of state?

  Thermal energy for a change of state = $\text{mass} \times \text{specific latent heat}$
• What is the formula for weight?

  Weight = $\text{mass} \times \text{gravitational field strength}$
• What is the formula for work done?

  Work done = $\text{force} \times \text{distance (along the line of action of the force)}$
• What is the formula for force in terms of spring constant and extension?

  Force = $\text{spring constant} \times \text{extension}$
• What is the formula for distance travelled?

  Distance travelled = $\text{speed} \times \text{time}$
• What is the formula for acceleration?

  Acceleration = $\frac{\text{change in velocity}}{\text{time taken}}$
• What is the formula for resultant force?

  Resultant force = $\text{mass} \times \text{acceleration}$
• What is the formula for momentum?

  Momentum = $\text{mass} \times \text{velocity}$
• What is the formula for period?

  Period = $\frac{1}{\text{frequency}}$
• What is the formula for wave speed?

  Wave speed = $\text{frequency} \times \text{wavelength}$
• What is the formula for force on a conductor carrying a current in a magnetic field?

  Force = $\text{magnetic flux density} \times \text{current} \times \text{length}$
• What are the key equations related to energy in physics?

  • Kinetic energy: $KE =$$0.5 \times m \times v^2$
  • Elastic potential energy: $PE =$$0.5 \times k \times x^2$
  • Gravitational potential energy: $GPE =$$m \times g \times h$
  • Change in thermal energy: $\Delta E =$$m \times c \times \Delta T$
  • Work done: $W =$$F \times d$
• What are the relationships between power, energy, and efficiency?

  • Power: $P =$$\frac{E}{t}$ or $P =$$\frac{W}{t}$
  • Efficiency: $\text{Efficiency} =$$\frac{\text{useful output energy transfer}}{\text{total input energy transfer}}$
  • Charge flow: $Q =$$I \times t$
  • Potential difference: $V =$$I \times R$
• What are the formulas related to motion and forces?

  • Distance travelled: $d =$$v \times t$
  • Acceleration: $a =$$\frac{\Delta v}{t}$
  • Resultant force: $F =$$m \times a$
  • Momentum: $p =$$m \times v$
  • Force on a conductor: $F =$$B \times I \times l$
• What are the formulas related to waves and frequency?

  • Period: $T =$$\frac{1}{f}$
  • Wave speed: $v =$$f \times \lambda$
• What are the formulas related to density and thermal energy?

  • Density: $\rho =$$\frac{m}{V}$
  • Thermal energy for a change of state: $E =$$m \times L$
  • Weight: $W =$$m \times g$