A) \[{{a}_{r}}=0\]and \[{{a}_{t}}=0\]
B) \[{{a}_{r}}=0\]but\[{{a}_{t}}\ne 0\]
C) \[{{a}_{r}}=0\]but\[{{a}_{t}}=0\]
D) \[{{a}_{r}}\ne 0\]and\[{{a}_{t}}\ne 0\]
Correct Answer: C
Solution :
(i) If \[{{a}_{r}}=0\]and \[{{a}_{r}}=0\], then motion is uniform translatory. (ii) If \[{{a}_{r}}=0\] but\[a\ne 0\], then motion is accelerated translatory. (iii)If \[{{a}_{r}}\ne 0\] but\[{{a}_{r}}=0\], then motion is uniform circular. (iv) If \[{{a}_{r}}\ne 0\] and\[{{a}_{r}}\ne 0\], then motion is a non-uniform circular.
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