As a consequence of Newton's First Law, objects will move in a circular path only when an external force is applied to them.  When that force is removed, they will maintain a constant speed in a direction tangent to the circle.

The [[https://www.scienceoftech.net/phy/curvilinear-motion.html|interactive page]], captured in the image below, will launch a ball through a tube.  What will happen when it exits the tube?

[[https://www.scienceoftech.net/phy/curvilinear-motion.html|{{ ::interactives:curvilinear-motion.png?nolink&400 |}}]]

The Discover tab sets up random tubes and ball speeds, and allows the user to observe the path of the ball.

The Explore tab adds a velocity vector to the ball, a tangent line to the curve at its opening, and a yellow target.

The Master tab sets up a target, and gives control of the tube and ball properties to make the ball hit the target.

The More tab leads here.