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Change in total energy when a pendulum's length is reduced at the same amplitude

The same question, asked 3 times: 19 Apr 2025 S2, 26 Apr 2025 S1*, 12 May 2026 S2. Every wording below, oldest first.

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  1. Question 1

    19 Apr 2025 S2

    43
    If the length of the oscillating simple pendulum is made 13\frac{1}{3} times the original keeping amplitude same then increase in its total energy at a place will be

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  2. Question 2

    26 Apr 2025 S1

    9
    At a place, the length of the oscillating simple pendulum is made 14\frac{1}{4} times keeping amplitude same then the total energy will be

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  3. Question 3

    12 May 2026 S2

    119
    If length of oscillating simple pendulum is made (13)\left(\dfrac{1}{3}\right) times at a place keeping amplitude same then its total energy will be

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