Can a particle be accelerated
$(i)$ if its speed is constant?
$(ii)$ if its velocity is constant?
$(i)$ if its speed is constant?
$(ii)$ if its velocity is constant?
(A) $(i)$ Yes. $A$ particle moving with constant speed can be accelerated if its direction of motion changes,such as in uniform circular motion.
$(ii)$ No. Acceleration is defined as the rate of change of velocity. If velocity is constant,the rate of change of velocity is zero,meaning acceleration is zero.
$(ii)$ No. Acceleration is defined as the rate of change of velocity. If velocity is constant,the rate of change of velocity is zero,meaning acceleration is zero.
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