1. Force: This is the most direct cause of motion change. Force is a push or pull that can cause an object to start moving, stop moving, change direction, or change speed. Examples include a push on a swing, gravity pulling an apple to the ground, or friction slowing down a rolling ball.
2. Mass: This refers to the amount of matter in an object. The more massive an object is, the harder it is to change its motion. A larger force is needed to accelerate a heavier object.
3. Acceleration: This is the rate of change of velocity over time. An object accelerates when its speed changes, its direction changes, or both change. The greater the acceleration, the greater the change in motion.
In summary:
* Force is the direct cause of motion change.
* Mass determines how much force is needed to achieve a specific acceleration.
* Acceleration is the result of a force acting on a mass, and represents the change in motion.
