Cutting open a golf ball
|
|
Desktop Warfare Kits (Catapult) $18.79 Just add glue, scissors and an appreciation for the physics and art behind these medieval siege engines. High-quality models hurl a small ball more than 15 feet in 1 throw, with adjustable pads that change the trajectory angle and encourage experimentation for greater accuracy. Pre-cut, pre-drilled solid wood pieces are easy to assemble; models can be build in about 1 to 2 hours…. |
|
|
Floating Arm Trebuchet (F.A.T.) Competition Version $149.00 This newest version of our 21st century trebuchet is manufactured from top-quality engineered hardwood void-free plywood. Plywood is more dimensionally stable, a lot stronger, and a lot less expensive than natural hardwood. The F.A.T. is an updated version of the ancient trebuchet, designed from a modern understanding of physics and engineering principles for incredible power and range! Enginee… |
|
|
The Unofficial LEGO MINDSTORMS NXT Inventor’s Guide $29.95 … |
|
|
Sports Science Projects: The Physics of Balls in Motion (Science Fair Success) $26.60 Presents experiments and science fair projects that demonstrate the differences between kinds of sports balls and the relationship between their design and performance…. |