Physics

• Uniform acceleration is when the speed of an object changes at the same rate. This leads to the study of motion using equations and known as kinematics.
• Free fall motion


  • Acceleration of -9.8m/s2
  • Negative sign indicates downward acceleration
  • Value of acceleration in kinematic equations is -9.8 m/s2 for any freely falling object
• Object dropped from elevated height

  Initial velocity is 0 m/s
• Object projected upwards vertically

  Velocity is 0 m/s at peak of trajectory
• The value of velocity being 0 m/s at the peak of the trajectory can be used as one of the motion parameters in the kinematic equations
• *If an object is projected upwards in a perfectly vertical direction, then the velocity at which it is projected is equal in magnitude and opposite in sign to the velocity that it has when it returns to the same height.
• Projectile Motion


  A form of motion where an object given an initial velocity is thrown or projected and is allowed to be acted on by gravity in a curved-like path
• Projectiles


  Objects that follow a curved path called a trajectory
• Combining the principles and formulas allows us to make predictions concerning projectile motion
• Horizontally Launched Projectiles


  • Launched with an initial velocity from an elevated position
  • Follows a curved-like path to the ground
• Gravity is the natural force that causes objects to fall towards the earth
• The acceleration due to gravity is always directed downwards and has a value of -9.8m/s2
• Angle-Launched Projectiles


  • Launched at an angle with respect to the horizontal
  • Rises to a peak while moving horizontally
  • Upon reaching the peak, the projectile falls with a motion that is symmetrical to its path upwards to the peak
• Parabola


  An angle-launched projectile exhibits a full parabolic trajectory motion
• As the player kicked the rattan ball in the air, the ball will eventually go back to the ground still due to gravity as it moves horizontally
• Projectile motion consists of horizontal and vertical motion working independently