Question

Why does the pitch of the
sound increases when a nail is
hammered into a wall?

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Answer 1

Explanation:

Because a part of hammer's kinetic energy is turned into heat. This causes molecules in both the hammer and the nail to oscillate, and since temperature is proportional to the kinetic energy of object's particles, its temperature increases. The pitch of the sound increases because: ... Hence the pitch increases.

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Answer 2

Answer:

The pitch increases due to increase in frequency.

Explanation:

Because it’s the part of the nail that remains sticking out of the wall that’s vibrating. As the nail enters the wall, that part gets shorter and the frequency of the vibration increases.