# What is inital velocity?

### State in words how acceleration is calculated?

There are two methods, it depends on what variables you have: 1. Subtract the initial velocity from the final velocity and divide that whole term by the time (Vf- Vi)/t = a 2. Square both the initial velocity and the final velocity and subtract the squared inital velocity from the squared final velocity and that answer by two times the distance (Vf^2 - Vi^2)/2d = a

### What is the difference between initial velocity and final velocity?

Initial velocity is the velocity an object begins with Final velocity is the velocity at which the object ends up in Say a car is travelling at 13 m/s and then crashes into a wall stopping it it's intitial velocity was 13 m/s and it's final velocity is at 0 m/s or Say a car starts off at 5 m/s but then accelerates from 5 m/s to 10 m/s. It's inital velocity would be 5…

### What is the formula for deceleration?

The first answer is backward. Acceleration = (final velocity - initial velocity)/total time. For deceleration the formula is the same, the answer will just be negative. Agreed. In physics, there is no "deceleration", only negative acceleration. a = Δv / Δt There is no equation for "deceleration" as suggested below. Deceleration=(original velocity-final velocity)/Time Deceleration In Motion Deceleration = inital speed - final speed / total time taken