What is the distance from the center of a circle to its edge?
a force that opposes motion is?
what is inertia, and radius?
Maybe friction is a better term for force which opposes motion. Inertia opposes changes in motion.
To find the distance from the center of a circle to its edge, you need to determine the radius of the circle. The radius is a line segment that connects the center of the circle to any point on its edge. If you know the radius or have the value of it, that will directly give you the distance from the center to the edge.
Alternatively, if you have the diameter of the circle, you can divide it by 2 to find the radius. The diameter is the distance across the circle, passing through the center.
Now, regarding your second question, the force that opposes motion is commonly known as friction. Friction is a force that acts in the opposite direction to the motion of an object. It occurs when two surfaces come into contact and resist relative motion between them. Friction can occur between objects that are stationary or in motion. To identify friction as the force that opposes motion, you need to have an understanding of basic physics principles.