Three-wheeled carts effectively demonstrate elastic and inelastic collisions, conservation of energy, or momentum, velocity, and acceleration. One cart is equipped with an adjustable low-friction spring mechanism for weak or strong collisions and “explosions.” Both carts are made of dimensionally stable MDF with a formed plastic covering. Specially modified low-friction ball-bearing wheels and axles are designed for smooth performance. Includes a package of 10 towing bands and two spring loops, as well as complete operating instructions. Carts are each 22 x 8 x 11cm and 0.73kg. Also available without spring loops.
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