The piston is least affected by pressure changes when it is near which positions?

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Multiple Choice

The piston is least affected by pressure changes when it is near which positions?

Explanation:
The key idea is that the piston’s response to inside‑c cylinder pressure depends on its instantaneous motion. When the piston is at the ends of its travel, near top dead center and near bottom dead center, its velocity is momentarily zero. With almost no motion to begin with, a pressure pulse can’t easily push the piston far or change its direction, so the piston is least affected by pressure changes there. In the middle of the stroke, the piston is moving fastest, so the same pressure fluctuations produce larger accelerations and bigger changes in motion. That’s why the piston is least influenced by pressure changes when it’s near the dead centers, and especially near bottom dead center.

The key idea is that the piston’s response to inside‑c cylinder pressure depends on its instantaneous motion. When the piston is at the ends of its travel, near top dead center and near bottom dead center, its velocity is momentarily zero. With almost no motion to begin with, a pressure pulse can’t easily push the piston far or change its direction, so the piston is least affected by pressure changes there. In the middle of the stroke, the piston is moving fastest, so the same pressure fluctuations produce larger accelerations and bigger changes in motion. That’s why the piston is least influenced by pressure changes when it’s near the dead centers, and especially near bottom dead center.

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