Science

• Projectile


  • Any object upon which the only force is gravity
  • Travels with a parabolic trajectory due to the influence of gravity
  • No horizontal forces acting upon it and thus no horizontal acceleration
  • Horizontal velocity is constant (never changing in value)
  • Vertical acceleration caused by gravity is 9.8 m/s^2, down
  • Vertical velocity changes by 9.8 m/s each second
  • Horizontal motion is independent of its vertical motion
• If an object is projected from rest at an upward angle

  • It is possible to resolve its initial velocity into two components that function independently of one another
  • The upward velocity is continuously accelerating downward, leading to it rising to the highest point and then dropping down to the ground
  • The horizontal motion is a continuous motion of velocity and does not change
• Projectile


  An object that we give an initial velocity, and gravity acts on
• Horizontal range


  The distance along the horizontal plane of a projectile
• Horizontal range


  Depends on the initial velocity V0, the angle θ of initiation and the acceleration due to gravity
• As the angle increases


  The height also increases
• If the angle is less than 45 degrees


  The range is increasing
• If the angle is greater than 45 degrees

  The range is decreasing
• As the angle increases


  The time also increases
• Maximum range is achieved if the projectile is fired at an angle of 45 degrees