Give an example of a body moving with zero angular acceleration but non-zero radial acceleration.
Uniform circular motion is an example of a body moving with zero angular acceleration, but non-zero radial acceleration.
Angular acceleration is the rate of change of angular velocity, which is zero for uniform circular motion.
Centripetal acceleration, when directed along the radius gives us the radial acceleration.
Radial acceleration = 
, is non-zero.
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