Centripetal 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: NCERT Class 11 Physics Part I, Chapter 4, Motion in a Plane._
Related questions
The time for one full revolution is the:Newton named the centre-directed acceleration:The acceleration in uniform circular motion always points:A car goes round a roundabout at a steady 20 km/h. Its motion is:For a fixed launch speed, range is greatest at a launch angle of:The horizontal distance from launch to where the projectile lands back at the same level iTime of flight is twice the time to reach maximum height because the path is:While a ball is in flight, ignoring air, its acceleration points: