Work Power and Energy 4 Question 3
4. A simple pendulum is oscillating without damping. When the displacement of the bob is less than maximum, its acceleration vector $\mathbf{a}$ is correctly shown in
(2002, 2M) (a)
(c)
(b)
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Answer:
Correct Answer: 4. (c)
Solution:
- Net acceleration a of the bob in position $B$ has two components.
(a) $\mathbf{a} _n=$ radial acceleration (towards $B A$ )
(b) $\mathbf{a} _t=$ tangential acceleration (perpendicular to $B A$ )
Therefore, direction of $\mathbf{a}$ is correctly shown in option (c).
