What is the primary effect of gravity?

The primary effect of gravity is that it pulls objects toward the center of the Earth. Gravity is a fundamental force of nature that acts on all objects with mass, causing them to experience an attractive force toward the center of a massive body, such as Earth. This force is responsible for keeping us grounded, causing objects to fall when dropped, and influencing the motion of celestial bodies in space.

The concept of gravity explains why when you release an object, it accelerates downward toward the Earth, demonstrating the force pulling it in that direction. Generally, this force affects so many aspects of our daily lives and the universe as a whole, making it a crucial concept in physics and understanding motion.

In contrast, other options, like causing circular motion, increasing speed, or opposing motion, do not accurately describe the fundamental role that gravity plays. While gravity can influence the motion of objects in various ways, its primary role remains that of an attractive force pulling objects toward the center of mass, primarily the Earth in most contexts we encounter.