Physics

• Connecting components in parallel


  1. They are connected on different branches

  2. With two or more loops and current paths

  3. If a lamp was to break or a component were to disconnect, the others continue to work as normal
• Parallel circuit


  • Can't be joined
  • Has multiple loops
• Series circuit


  • Has 1 loop
  • Components are connected end-to-end
• When connecting components in a parallel circuit, the current divides up between the components
• A switch in the open position breaks the circuit
• A switch in the closed position completes the circuit
• Kinetic energy


  Ek = 1/2 mv^2
• Kinetic energy is measured in joules
• Kinetic energy equals half the mass (in kingrams) multiplied by the velocity (in metres per second) squared
• Kinetic energy of a 20kg dog running at 10m/s

  • Ek = 1/2 x 20 x 10^2 = 1000 joules
• Kinetic energy of a 3kg rabbit moving at 1m/s

  • Ek = 1/2 x 3 x 1^2 = 1.5 joules
• Gravitational potential energy


  Ep = mgh
• The change in gravitational potential energy is equal to the mass multiplied by the gravitational field strength multiplied by the change in height
• Gravitational potential energy is measured in joules
• Change in gravitational potential energy


  Ep = mgh
• Kinetic energy


  Ek = 1/2 mv^2