Physics - Key formulas: Paper 2

• Spring constant (N/m)


  Force (N) / Extension (m)
• Pressure (due to column of liquid) (N/m)


  Height x density x gravitational field strength
• Acceleration (m/s^2)


  Change in velocity (m/s) / time taken (s)
• (final velocity)^2 - (initial velocity)^2


  2 x acceleration x distance
• Resultant force


  Mass x Acceleration
• Momentum


  Mass x Velocity
• Change in momentum


  Force x Time
• Wave speed


  Frequency x Wave length
• Force (at a right angle to a magnetic field)


  Magnetic flux density x current x length
• Potential difference across a primary coil / Potential difference across a secondary coil


  Number of turns in a primary coil / Number of turns in a secondary coil
• Potential difference across a primary coil x current in primary coil


  Potential difference across a secondary coil x current in a secondary coil