• Projectile motion is a curved path of a combination of horizontal and vertical motion
• horizontal is independent of vertical
• horizontal velocity isn't affected by vertical force of [[Gravity]]
• ![[projectile motion.png]]
• horizontal speed is constant
• 45 deg is farthest
• complements are equal (59deg and 40deg)

Orbits

• Keplers first law
  • all planets move in eliptical orbits with sun at one focus
• Second law of areas
  • ![[orbit area.png]]
  • All equal areas in equal time
• Third law of periods
  • Square of ratio of periods of 2 planets revolving the sun is equal to the cube of the average distances
  • $$(\frac{T_1}{T_2})^2 = (\frac{r_1}{r_2})^3$$