A simple pendulum is oscillating with an angular amplitude of 90 ° . If the direction of resultant acceleration of the bob is horizontal at a point then angle made by the string with vertical is

Question

A simple pendulum is oscillating with an angular amplitude of 90 ° . If the direction of resultant acceleration of the bob is horizontal at a point then angle made by the string with vertical is, sin - 1 ⁡ 1 3, cos - 1 ⁡ 1 3, sin - 1 ⁡ 1 3, cos - 1 ⁡ 1 3

MARKS App · Accepted Answer

tan ⁡ θ = v 2 r g sin ⁡ θ But v 2 = 2 g h ; h = r cos ⁡ θ cos ⁡ θ = 1 3 ⇒ θ = cos - 1 ⁡ 1 3

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