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Explain why, we can easily move our hand in air but to do the same through a plank of wood, we need a karate expert.
We can move our hand easily in the air as the force of attraction between the particles of air is very small, as there are large inter-molecular spaces in the air. However, we can’t move our hand through a plank of wood as the force of attraction between the particles of wood, that is a solid substance, is very strong and the inter-molecular spaces are negligible. This is why we can’t move our hand through a plank of wood and need a karate expert to do so.
Updated on: 10-Oct-2022
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