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Centripetal acceleration is...

Centripetal acceleration is

A

a constant vector

B

a constant scalar

C

a magnitude changing vector

D

not a constant vector

Text Solution

Verified by Experts

The correct Answer is:
D
Centripetal acceleration `a_(c)=(v^(2))/(R)`
where v is the speed an object and R is the radius of the circle.
It is always directed towards the centre of the circel. Since v and R are constants for a given uniform circular motion, therefore the megnitude of centripetal accleration is also constant. However, the direction centripetal acceleration changes continounsly. Therefore, a centripetal acceleration is not a constant vector.
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Knowledge Check

  • The term centripetal acceleration was proposed by

    A
    Huygens
    B
    Kepler
    C
    Newton
    D
    Galileo

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