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FORCE, MOTION & PRESSURE, CONTINUEDHooke’s Law ApparatusMeasure and prove that the stretch of a spring is proportional to its load with a Hooke’s Law Apparatus. You can also determine harmonic motion by counting oscillations. Apparatus consists of a rotatable millimeter scale, support rod, metal base, spring, weight holder with pan and pointer, adjustable spring hanger and complete instructions. Slotted weights are included.AP9210 I $42.65Mousetrap Cars—Super Value Guided-Inquiry KitIntegrate content and reasoning through science and engineering practices as students investigate the parts of a mousetrap car (wheel diameter, hub diameter, length of lever arm) to determine how each affects its performance. Students analyze their quantitative data to design a solution and develop communication skills presenting their evidence-based designs. Cars are easy to assemble. Super Value Kit is complete for six student groups.AP7667 I $140.75Principles of Hydraulics—Student Laboratory KitLet students discover hydraulic principles by measuring piston diameters, areas and forces necessary to lift specific loads. Significance of the mechanical advantage calculation becomes clear with manipulations of the hydraulic system. Students build a working model hydraulic jack, and the transparent valves and tubing they use allow them to view all the working parts. Includes one complete hydraulics system.AP6494 I $64.00Newtonian DemonstratorThis classic demonstrator is perfect for illus-trating Newton’s laws of motion and the conservation of momentum. The large swing-ing balls can be manually aligned to produce nearly perfect elastic collisions. High-quality wooden construction will last for years. Measures 7” x 9” x 8½”.AP6913 I $34.95Build a Model Catapult—Flinn STEM Design Challenge™Inspire creative engineering with this high-fly-ing design challenge! Students build basic catapults with simple materials, then test them to determine how variables like length of the lever arm and mass of projectile affect launch distance. Using the observed data, students make design improvements to accu-rately hit a target. Students apply knowledge of levers, potential and kinetic energy and projectile motion.AP8054 I $46.80Collision in Two DimensionsStudy conservation of momentum and energy in collisions by demonstrating elastic and inelastic collisions. Hold a steel ball at the top of a curved aluminum track and release it. It travels down the track and collides with another ball on an adjustable target support. Students observe how the two balls fall. Includes complete instructions, track, two steel balls, hollow wooden ball and a plumb bob.AP9165 I $25.85