Physics 2

• Scalar


  Only has a magnitude or size
• Vector 


  Magnitude and direction
• Sum of scalar quantities

  Add all quantities
• Contact forces 


  Forces that act between two touching objects
• Tension


  Something being stretched
• friction


  Two objects sliding opposite ways
• Air resistance


  Two objects having same amount of forces in opposite direction
• Non contact force


  Two objects with force not touching
• Magnetic force


  Objects within a magnetic field
• Electrostatic force


  Any particle within an electrostatic field
• Gravitational force


  Experienced by any mass in a gravitational field
• Change on a shape

  Deformation
• Elastic deformation


  Reversed when force is removed
• Inelastic deformation


  Not fully reversed when force is removed
• Hookes law


  F = ke
• Limit of proportionality 


  Point beyond where Hookes law is no longer true when stretching a material
• Momentum 


  Product of mass and velocity
• Total momentum before an event = 


  Total momentum after an event
• Angle of incidence = 


  Angle of reflection
• What is the reflection of waves measured between

  Light ray and normal ray
• Specular reflection


  Reflection from a smooth flat surface
• Diffuse reflection


  Scattered reflection from a rough surface
• What happens to waves at a boundary

  Changes in direction between two transparent materials
• Density of a material affects...

  speed that a wave will be transmitted
• Wave speed =


  frequency x wavelength
• What is a balanced force


  Equal in size in opposite directions
• Balanced force resultant force

  0
• Unbalanced forces cause


  A change in motion as they aren't equal in size
• Alpha wave is a


  Nucleus of a helium
• Beta wave is


  An electron
• Gamma wave is


  An electromagnetic wave
• Alpha charge


  +2
• Beta charge


  -1
• Gamma Charge


  0
• Alpha mass


  Relatively large
• Beta Mass


  Very small
• Gamma mass


  No mass
• Alpha distance


  Cm
• Beta distance


  M
• Gamma distance


  Km