AQA GCSE PHYSICS EQUATIONS 9-1

AQA GCSE PHYSICS EQUATIONS 9-1

1. ENERGY

   • KINETIC ENERGY = 1/2 MASS X VELOCITY^2
   • ELASTIC POTENTIAL ENERGY = 1/2 SPRING CONSTANT X EXTENSION^2
   • GRAVITATIONAL POTENTIAL ENERGY = MASS X GRAVITATIONAL FIELD STRENGTH X HEIGHT
   • POWER = ENERGY TRANSFERRED / TIME
   • POWER = WORKD DONE / TIME
   • EFFICIECNY = USEFUL ENERGY OUT / TOTAL ENERGY IN
   • EFFICIENCY = USEFUL POWER OUT / TOTAL POWER IN

2. ELECTRICTY

   • CHARGE = CURRENT X TIME
   • POTENTIAL DIFFERENCE = CURRENT X RESISTANCE
   • POWER = POTENTIAL DIFFERENCE X CURRENT
   • POWER = CURRENT^2 X RESISTANCE
   • ENERGY = POWER X TIME
   • ENERGY = CHARGE X POTENTIAL DIFFERENCE

3. PARTICLE MODEL OF MATTER

   • DENSITY = MASS / VOLUME
   • CHANGE IN THERMAL ENERGY = MASS X SPECIFIC HEAT CAPACITY X TEMPERATURE CHANGE
   • ENERGY = MASS X SPECIFIC LATENT HEAT

4. FORCES

   • WEIGHT = MASS X GRAVITATIONAL FIELD STRENGTH
   • WORK DONE = FORCE X DISTANCE
   • FORCE = SPRING CONSTANT X EXTENSION
   • ELASTIC POTENTIAL ENERGY =1/2 SPRING CONSTANT X EXTENSION^2
   • DISTANCE = SPEED X TIME
   • ACCELERATION = CHANGE IN VELOCITY / TIME
   • FINAL VELCOITY ^2 - INITAL VELCOITY^2 = 2 X ACCELRATION X DISTANCE
   • FORCE = MASS X ACCELERATION
   • MOMENTUM = MASS X VELOCITY

5. waves

   • period = 1/ frequency
   • velocity = frequency x wavelength

6. MAGNETISM AND ELECTROMAGENTISM

   • FORCE = MAGNETIC FLUX DENSITY X CURRENT X LENGTH