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  4. A simple pendulum is oscillating. When the displacements of the bob are maximum, its acceleration vector overset arrow a is correctly shown in :

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Q. A simple pendulum is oscillating. When the displacements of the bob are maximum, its acceleration vector $\overset{ \rightarrow }{a}$ is correctly shown in :

NTA AbhyasNTA Abhyas 2022

Solution:

When the bob is at maximum displacement its velocity is zero.
Hence, centripetal acceleration $a_{c}=\frac{v^{2}}{R}=0,$
Therefore, only tangential acceleration will act.