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Writing doesn't require friction, and writing devices such as pencils have been designed to reduce the amount of friction they cause when writing. However, writing does require adhesion (cohesive intermolecular forces) between writing utensils and writing surfaces!
Writing doesn’t require friction, and writing devices such as pencils have been designed to reduce the amount of friction they cause when writing. However, writing does require adhesion (cohesive intermolecular forces) between writing utensils and writing surfaces!
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