$$\rightleftharpoonup{xx}$$
$$\longleftharp{xx}$$,
$$\longrightharp{xx}$$,
Have you ever swung a ball tied to a string over your head? That’s circular motion.
In circular motion, an object moves in a circle instead of a straight line.
Even if the ball keeps the same speed, its direction constantly changes.
And remember—acceleration isn’t just about speeding up; changing direction at a constant speed is also acceleration. So, circular motion is a kind of accelerated motion!
But what keeps the ball moving in a circle?
If you let go of the string, the ball flies off in a straight line, tangential to the circle, because nothing pulls it inward anymore.
The only reason it stays in a circle is that your hand constantly pulls it inward with the string.
That inward pull is a special force called centripetal force. It always points toward the center.
The same idea helps the Moon orbit Earth. Gravity provides the centripetal force that pulls the Moon toward Earth, keeping it in orbit.
Next time you see circular motion—like a turning car or an orbiting planet—look for the inward pulling force!
