# A key of a mechanical piano struck gently and then struck again but much harder this time. In the second case$(a)$. sound will be louder but pitch will not be different$(b)$. sound will be louder and pitch will also be higher$(c)$. sound will be louder but pitch will be lower$(d)$. both loudness and pitch will remain unaffected

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If a key of the mechanical piano is first struck gently and then struck again but much harder this time. In the second case, the sound will be louder but the pitch will not be different.

So, option $(a)$ is correct.

Updated on 10-Oct-2022 13:28:52