Studying the frictional force directions via bristles

• المؤلفون الرئيسيون: S. Prasitpong, R. Chitaree, S. Rakkapao
• مؤلفون آخرون: Mahidol University
• التنسيق: مقال
• منشور في: 2018
• الموضوعات: Physics and Astronomy; Social Sciences
• الوصول للمادة أونلاين: https://repository.li.mahidol.ac.th/handle/123456789/29942

We present simple apparatus designed to help Thai high school students visualize the directions of frictional forces. Bristles of toothbrushes, paintbrushes and scrubbing brushes are used to demonstrate the frictional forces acting in a variety of situations. These demonstrations, when followed by d...