science wk 1

• Projectile motion is a form of motion where an object moves in a curved path
• Projectile


  The object that is thrown or projected and exhibits projectile motion
• Trajectory


  The curve-like path undertaken by a projectile
• Projectile motion consists of horizontal and vertical motion working independently
• Horizontal motion of a projectile

  • No resistance in any form (air resistance neglected)
  • Constant horizontal velocity (represented as vx)
  • Horizontal acceleration is zero
  • Horizontal distance is called range (represented as dx)
• Vertical motion of a projectile

  • Force acting is gravity (represented as g or ay)
  • Constant acceleration due to gravity is -9.8 m/s^2
  • Vertical velocity is not constant (represented as vy)
  • Vertical distance is called height (represented as dy)
• Solving a problem on horizontal launched projectile

  1. Given: Horizontal distance (dx), Initial velocity (vi), Acceleration due to gravity (g)

  2. Find: Height of table (dy), Final velocity (vf)

  3. Step 1: Find time using dx and vi

  4. Step 2: Use time to find dy

  5. Step 3: Use dy to find vf
• The negative sign in the final velocity indicates the downward direction
• Projectile motion can be observed in both horizontal and angle-launched scenarios