Question

A simple pendulum is oscillating without damping. When the displacement of the bob is less than maximum, its acceleration vector a is correctly shown in

• A.
• B.
• C.
• D.

Answer 1

Answer: (C)

Answer 2

Net acceleration a of the bob in position B has two components.
(a) $a_n$ = radial acceleration (towards BA)
(b) $a_t$ = tangential acceleration (perpendicular to BA)
Therefore, direction of a is correctly shown in option (c).