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.