The start of school 2017-2018, I’m attending in physic class and we’re learning about kinematic. Based on the definition on the internet, the word kinematic is the branch of mechanics concerned with the motion of objects without reference to the forces which cause the motion.
There are fours equation in kinematic which uses to identify distance(d), time(t), a(acceleration), gravitational(g), Initial Velocity(Vi) and Final Velocity(Vf).
Keep in mind that something starts from rest then Vi is zero but if something comes to a stop then Vf is zero. If something falls down then it will be negative acceleration which is the gravity of -9.8m/s2. Related to negative acceleration is when something falls down or deceleration. Lastly, when throwing an object straight up and it comes back down at the same place without air resistance so the Vi is equal to Vf.