Friction board with blocks, 1 Each

The United Scientific® Friction board with blocks by United Scientific is a physics teaching set for comparing frictional force across four surfaces: cardboard, 220-grit sandpaper, cork and vinyl. Students drag 1.75″ x 1.75″ blocks along 8″ sections with a spring scale and add masses to study how load affects friction. Used in middle school, high school and introductory physics labs.