3.5 Addition of Velocities

• object has a velocity relative to a medium - one of two to add velocities
• velocity of the object relative to the observer is the sum of these velocity vectors
• Vx = v cos 0
• Vy = v sin 0
• v = square root of Vx^2 + Vy^2
• 0 = tan-1(Vy/Vx)
• specify that a velocity is relative to a frame of reference (Relative Velocities)
• relative velocities are one aspect of relativity
• Relativity - study how different observers moving relative to each other measure the same phenomenon
• Relativity associates to Einstein
• Classical Relativity is limited to situations where speeds are less than about 1% of the speed of light (most things in daily life is slower than this)