Here's why:

* Newton's Second Law of Motion: This law states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. In simpler terms, the more force you apply, the faster the object will accelerate. The heavier the object, the less it will accelerate for the same force.

* Motion: Acceleration is the rate of change of velocity. Since the object is initially stationary, any acceleration will cause it to start moving.

In summary: A force applied to a stationary object will make it move, and the amount of force will determine how quickly it starts moving (its acceleration).