- An object will
**not** change its **velocity** (accelerate/decelerate) unless there is an **unbalanced force** acting on it.
- the acceleration/ deceleration depends on the
**s****ize** of the unbalanced force and the **mass** of the object.

- on a force diagram, an unbalanced force will be represented by unequal arrows

**unbalanced force = resultant force**

*3 Key Points:*

- bigger force = greater acceleration/ deceleration
- bigger mass = smaller acceleration
- to get a big mass to accelerate as fast as a small mass, it needs a bigger force

*Formula:*

*F=MA (force = mass x acceleration)*

- acceleration of an object = proportional to the resultant force of an object
- acceleration of an object is proportional to the mass of an object
- acceleration of an object increases if resultant force increases, and decreases if mass increases

## Comments

No comments have yet been made