A newton is a unit of force in the International System of Units (SI). It is defined as the amount of force required to accelerate a one-kilogram mass by one meter per second squared. Therefore, "49 newtons" represents a specific amount of force that can be applied to an object, such as a ball or a car. In practical terms, 49 newtons is roughly equivalent to the weight of a small dog or a medium-sized backpack. This force can be used to lift, push, or pull objects, demonstrating how newtons are essential for understanding the mechanics of movement and weight in everyday life.