A space saver! The conical redwood dart moves in a
nearly frictionless arc to collide with the redwood block,
enabling students to easily perform quantitative analysis.
The dart has a 4 cm nail head and can be suspended from
any right angle extension rod. It measures 4.5 cm at its
widest point by 20 cm long. The block measures 9 cm
wide by 30 cm high. Furnished with eye screws and