What will cause a change in an object's state of motion

A change in an object's state of motion can be caused by a force being applied to it. This is according to Newton's first law of motion, also known as the law of inertia, which states that an object at rest tends to stay at rest and an object in motion tends to stay in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

Here are the steps that explain this:

1. Consider an object at rest. According to the law of inertia, it will remain at rest unless a force acts on it. This could be any force - gravity, friction, or a push or pull.

2. If a force is applied, the object's state of motion changes - it may start moving, stop moving, or change its speed or direction of motion. The greater the force, the greater the change in motion.

3. The same applies to an object already in motion. It will continue moving at the same speed and in the same direction unless a force acts on it. If a force is applied, it could speed up, slow down, or change direction.

4. The change in motion caused by the force (also known as acceleration) depends not only on the force but also on the mass of the object. This is according to Newton's second law of motion. The larger the mass, the less the acceleration for a given force.

5. Finally, it's important to note that forces always come in pairs. If object A exerts a force on object B, then object B exerts an equal and opposite force on object A. This is Newton's third law of motion. So,