physics

• Power (P) = energy transfer rate / time taken
• The SI unit of energy is the joule (J).
• formula for force

  force = mass x acceleration
• formula for pressure

  pressure = force/area
• formula for effeciency

  effeciency=useful power output/ total power input
• formula for power

  power= work done/ time taken
• formula for velocity

  velocity= change in speed / time
• formula for pressure (gas)

  pressure (gas) = atmospheric pressure + ρgh 
• formula for pressure in liquid

  pressure (liquid)= ρgh
• formula for pressure

  pressure= force/area
• Formula for GPE

  GPE= mass x g x change in height 
• formula for momentum

  momentum=mass x velocity
• formula for density

  density= mass/volume
• formula for moment

  moment= force x distance
• moment rules

  anticlockwise moment = clockwise moment
• hooks law

  applied force= force constant x extension
• Volume of a regular solid


  Volume=height x weight x width
• formula for acceleration


  acceleration=change in velocity / time taken
• formula for velocity


  velocity=displacement/time