Question

A simple pendulum is vibrating with angular amplitude of
90° as shown in figure.
For what value of ϴ is the acceleration directed
(i) vertically upwards
(ii) horizontally
(iii) vertically downwards
(a) 0°, cos⁻¹ 1/√3, 90°
(b)cos⁻¹ 1/√3, 0°, 90° (c)90°, cos⁻¹ 1/√3, 0° (d) cos⁻¹ 1/√3, 90°, 0°

Answer 1

Answer:

(b) option is correct

Explanation:

(b) option is correct.....

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Answer 2

Answer:

I thought c option is correct answer

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