Kinematic Equations:
* v = u + at (where 'v' is final velocity, 'u' is initial velocity, 'a' is acceleration, and 't' is time)
* s = ut + (1/2)at² (where 's' is displacement)
* v² = u² + 2as
When Acceleration is Zero:
* The first equation becomes: v = u. This simply means that the final velocity is the same as the initial velocity – the object moves at a constant speed.
* The second equation becomes: s = ut. This means the displacement is simply the initial velocity multiplied by the time.
* The third equation becomes: v² = u². This reinforces that the final and initial velocities are equal.
Example:
Imagine a car moving at a constant speed of 20 m/s. This means its acceleration is zero. You want to know how far it travels in 5 seconds.
* Using the simplified kinematic equation: s = ut = (20 m/s) * (5 s) = 100 meters
In Conclusion:
While kinematic equations are usually associated with situations involving acceleration, they are perfectly applicable in cases where the acceleration is zero. They simplify to describe uniform motion (constant speed) and provide useful information like displacement.
