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 = $0.5 \times \text{spring constant} \times \text{extension}^2$
• 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? (shc)

  Change in thermal energy = $\text{mass} \times \text{specific heat capacity} \times \text{temperature change}$
• How is efficiency calculated?

  Efficiency = $\frac{\text{useful output energy transfer}}{\text{total input energy transfer}}$
• What is the relationship between power, useful power output, and total power input?

  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 relationship between potential difference, current, and resistance?

  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 the formula for power in terms of current and resistance?

  Power = current^2 x resistance
• What is the formula for work done in terms of power and time?

  Work done = $\text{power} \times \text{time}$
• What is the formula for energy transferred in terms of power and time?

  Energy transferred = $\text{power} \times \text{time}$
• What is the formula for power in terms of force and resistance?

  Power = $\text{force} \times \text{resistance}$
• density = mass / volume
• acceleration = change in velocity / time taken
• distance = speed x time
• force = spring constant x extension (f = ke)
• work done = force x distance moved (J)
• weight = mass x gravitational field strength
• (final velocity)2 - (initial velocity)2 = 2 × acceleration × distance
• thermal energy for a change of state = mass x specific latent heat
• unit for acceleration 


  m/s^2
• stationary


  describe the motion between B and C

  
• -both accelerating -A-B has a higher acceleration -as shown by a steeper line 


  compare motion between A-B and C-D

  
• $a =$$\frac{{\Delta v}}{{\Delta t}}$


  acceleration formula
• when using the suvat formula displacement is represented by s