Multiple choice

In a case of uniform circular motion, the acceleration is

  1. zero

  2. constant in magnitude and directed radially inwards

  3. variable in magnitude, but constant in direction

  4. variable in magnituude, but tangential to the circle
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In uniform circular motion, the speed is constant but velocity continuously changes direction. This change in velocity toward the center creates centripetal acceleration - constant in magnitude (v²/r) and always directed radially inward toward the center of the circle.

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