A) \[{{a}_{r}}=0\]and \[{{a}_{t}}=0\]
B) \[{{a}_{r}}=0\]but \[{{a}_{t}}\ne 0\]
C) \[{{a}_{r}}\ne 0\]but \[{{a}_{t}}=0\]
D) \[{{a}_{r}}\ne 0\]and\[{{a}_{t}}\ne 0\]
Correct Answer: C
Solution :
[a] If\[{{a}_{r}}=0\]and\[{{a}_{t}}=0,\]then motion is uniform translatory [b] If\[{{a}_{r}}=0\]but\[{{a}_{t}}\ne 0,\]then motion is accelerated translatory [c] If\[{{a}_{r}}\ne 0\]but\[{{a}_{t}}=0,\]then motion is uniform circular [d] If\[{{a}_{r}}\ne 0\]and\[{{a}_{t}}\ne 0,\]then motion is a non-uniform circular
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