Kinematic Equations 1D

Basic Terms

  • Speed
  • Velocity
  • Instantaneous Velocity
  • Distance
  • Displacement
  • Acceleration

Five variables In Kinematic Equations

  • Displacement
  • Initial velocity 
  • Final Velocity
  • Change in Time 
  • Constant acceleration

https://www.khanacademy.org/science/physics/one-dimensional-motion/kinematic-formulas/a/what-are-the-kinematic-formulas

One Important Understanding: Mass of an object DOES NOT affect its motion, such as time to hit the ground!

Hints You Can Get From Problems

  • An object is thrown horizontally
    • Initial vertical velocity is 0 m/s, and vertical velocity is affected by gravity only.
    • Horizontal velocity is constant (ignore air resistance)
    • If the horizontal displacement and velocity/speed is given. The time for the object to reach the ground level can be calculated by using t=x/v, where x is the horizontal displacement and v is horizontal velocity.
    • The vertical displacement can also be calculated after time is known.
  • An object is dropped from a height of...
    • Both initially vertical and horizontal velocity is 0m/s
    • Vertical velocity is affected by gravity only, and horizontal velocity is alway 0 m/s.
    • The final vertical velocity can be calculated by using the formula of v=gt, where g is gravitational acceleration and t is time. 
    • The the question asks you to find the time for the object is reach ground level, and vertical displacement is given, the use the formula of h=0.5gt^2.

Practice Questions

 Questions For IB Students


2 1 Kinematic
PDF – 54.2 KB 61 downloads
21 Kinematics 20151002
PDF – 110.1 KB 62 downloads

Challenging Questions

Video Explanation


Motion In 1D 6 Challenging Questions
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My Working Sol
Image – 5.1 MB 67 downloads