Question

A particle moves along a horizontal circle
with constant speed. If 'a' is its acceleration
and 'E' is its kinetic energy
A) a is constant B) E is constant
C) a is variable
D) E is variable
(A) A & B are correct
(B) C&D are correct
(C) A & D are correct
(D) B & C are correct​

Answer 1

the correct answer is option d

in circular motion the acceleration changes but kinetic energy won't change since it is dependent on speed.

as speed is constant the kinetic energy is also constant but velocity changes due to change in direction

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