* Newton's Laws of Motion: Newton's laws of motion describe how forces affect objects. The most important one for this question is Newton's Second Law:
* Force = Mass x Acceleration
* Acceleration: Acceleration is a change in an object's velocity. Velocity has two components: speed and direction.
* Speed: How fast an object is moving.
* Direction: Which way the object is moving.
So, if you apply a force to an object, you cause it to accelerate. This means its speed or direction (or both) will change.
