Module 5 - Projectile Motion

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Inquiry Question: How can models that are used to explain projectile motion be used to analyse and make predictions?

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Analyse the motion of projectiles by resolving the motion into horizontal and vertical components, making the following assumptions:

  • a constant vertical acceleration due to gravity
  • zero air resistance

2DMotion2D Motion

  • Resolving Vectors;   * Split the vector into it’s horizontal and vertical components   * Add the perpendicular vectors to find the resultant vector
  • Horizontal and Vertical Components;   * The vertical component can be treated as an object traveling straight down
  • Assumptions:   * The only force acting on something moving and falling is gravity   * Gravity is a constant force acting downwards on all objects

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Apply the modelling of projectile motion to quantitatively derive the relationships between the following variables:

  • initial velocity
  • launch angle
  • max. height
  • time of flight
  • final velocity
  • launch
  • height
  • horizontal range of the projectile

\ ProjectileMotionRelationshipsProjectile Motion Relationships

  • Start by decomposing velocity into horizontal and vertical components
  • Finish by combining the horizontal and vertical components together
  • If starting from ground level:   * Maximum Height     *

    \   * Time of flight     *

    \   * Horizontal Range     * d = s x t

  • If not at ground level, set vertical displacement to zero at the start point

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Conduct a practical investigation to collect primary data in order to validate the relationships derived above.

\ Practical Investigation into Projectile Motion