Here's why:
* Newton's Second Law: 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. Mathematically, it's represented as: F = ma
* Net Force: This is the vector sum of all forces acting on an object. It determines the object's overall change in motion.
* Acceleration: This is the rate of change of velocity over time. It describes how quickly an object's velocity is changing and in what direction.
Therefore, if a net force acts on an object, the object will accelerate in the same direction as that net force.
Example:
* If you push a box to the right, the net force is to the right. The box will accelerate to the right, even if it's already moving in a different direction.
* If you throw a ball upward, gravity acts downward. The ball accelerates downward even though it's moving upward initially.
Key Points:
* Magnitude: The magnitude of the acceleration is directly proportional to the magnitude of the net force.
* Direction: The direction of the acceleration is always the same as the direction of the net force.
* Zero Net Force: If the net force on an object is zero, the acceleration is also zero, meaning the object is either at rest or moving at a constant velocity.
