alleryCentripetal acceleration has constant magnitude but is not a constant vector because its:
AUnit keeps changing
BSign keeps changing
CDirection changes
DMagnitude changes
Answer & Solution
Correct answer: C. Direction changes
1. Its size stays fixed since speed and radius are fixed.
2. But it always points at the centre, which is a moving direction.
3. So the direction changes.
_Source: syllabus Physics Part I, Chapter 4, Motion in a Plane._
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