projectile motion

    Cards (12)

    • Projectile
      An object that is "projected" or thrown, which has no capacity for self-propulsion
    • Actual forces on a projectile
      • Drag
      • Lift due to spin
      • Weight
      • Wind
    • A well-hit golf ball travels farther than ideal theory predicts because of lift due to spin
    • Ideal Projectile
      The only force is weight
    • An ideal projectile trajectory is a parabola
    • For a given launch speed, v0, the max range is at θ = 45
    • General Projectile Problem
      Use the two position equations to solve for the remaining two
    • Acceleration due to gravity
      Acts downward
    • Projectile motion
      • The acceleration due to gravity acts downward
      • The horizontal velocity is constant
      • The vertical velocity is zero at the highest point of the projectile's flight
    • Projectile motion
      1. Fired at an angle
      2. Neglecting air resistance
      3. Changing direction at the highest point
      4. Horizontal net force is zero
      5. Horizontal acceleration is zero
    • Projectile motion examples
      • Bullet fired at 45° angle
      • Golf ball shot in high arcing shot
      • Soccer ball kicked at 55° angle
    • The initial vertical velocity of a horizontally shot ball is zero
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