This question is an exact duplicate of:
A particle is moving on a circular path with constant speed. Which of the following is true?
(a)it posses radial acceleration.
(b)it posses radial velocity.
(c)it posses tangential acceleration.
(d)it does not posses tangential velocity.
The answer is option (a).
Now,my question is how the other 3 factors in option b,c,and d are becoming zero?why the body will have only radial acceleration?why only option (a) is true?