Courses: P3, P13, P15
A heavy brass spool rolls slowly on its axle down an inclined 2x4. When the outer rims hit the lecture bench it takes off at a much faster rate.
Courses: P3, P13, P15
A heavy brass spool rolls slowly on its axle down an inclined 2x4. When the outer rims hit the lecture bench it takes off at a much faster rate.