A vector quantity that is defined as the rate at which an object changes its velocity. An object is accelerating if it is changing its velocity.

Constant Acceleration: Velocity is changing at a constant amount each second

Formula- A= (Vf - Vi)/(time)

Since acceleration is a vector quantity, it has a direction associated with it. The direction of the acceleration vector depends on two things:

  • whether the object is speeding up or slowing down
  • whether the object is moving in the + or - direction


  • m/s/s
  • ml/hr/s
  • km/hr/s
  • m/s^2


1. The rocket that Carol made for her art project can go from 0-200 meters in 10 seconds, what is the acceleration of the rocket?

2. If a car goes from rest to 15 m/s in 3 seconds, what is the acceleration?

3. True or false? Acceleration can be negative

4. What is it called when an object's velocity is changing at a constant amount?

1. 20 m/s, 2. 5 m/s 3. True. 4. Constant acceleration

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