Product overview This teaching apparatus is designed for middle school physics experiments to determine projectile speed and to perform flat throw motion experiments. It combines a spring gun, an impact pendulum with cycloidal regulator, and an angle indicator to give reproducible, easy to read results for classroom lab work. Key components and specifications Spring gun: Composed of barrel, spring, bolt, board machine and fixed base plate. Designed to launch three different speed projectiles for comparative measurements. Impact pendulum: Built from four cycloids with the length from the suspension point to the plane of the pendulum specified as 200 2mm. Includes a cycloidal regulator and an internal damper. The combined mass of the bracket and the pendulum is 80 2g. Collisions between the projectile and the pendulum are inelastic and the pendulum motion is translational. Indicator: Consists of an angle plate and a pointer. The minimum angle of the angle plate is 0.50 and the maximum angle is 350. The pointer moment is balanced so the pointer can remain at any position for easy reading. Why this product is useful Designed for classroom use: Configured for middle school physics curricula to demonstrate projectile motion principles and to allow students to measure projectile speed directly. Clear experimental conditions: Fixed base plate and regulator ensure repeatable launches and controlled pendulum response, improving reliability of student measurements. Readable feedback: Balanced pointer and wide angle range on the indicator provide clear, stable readings after each collision, simplifying data collection and discussion. What makes it stand out Integrated setup: Combines launcher, pendulum, and indicator in one system so teachers can set up experiments quickly without assembling separate parts. Multiple speeds: Spring gun capable of launching three distinct projectile speeds makes comparison experiments straightforward. Cycloidal regulator and damping: Cycloidal geometry and internal damper help produce nearideal pendulum motion and moderate oscillations for clearer measurement of inelastic collisions. Practical attributes Function: Measure projectile speed via inelastic collision with the pendulum and observe flat throw motion behavior. Compatibility: Intended for middle school physics teaching and laboratory demonstrations. Size and mass notes: Pendulum length from suspension point to plane is 200 2mm. Bracket plus pendulum mass is 80 2g. Performance: Three selectable projectile speeds; inelastic collisions yield translational pendulum motion suitable for straightforward energy and momentum discussions. Example use scenarios Classroom lab: Students perform a series of launches at the three speeds, record pendulum deflection angles, and calculate projectile speed for each trial. Demonstration of flat throw motion: Teacher shows horizontal launch behavior and compares measured speeds to theoretical values derived from kinematic equations. Smallgroup experiments: Student groups test repeatability and discuss sources of experimental error using the integrated indicator readings and the damper to observe different damping effects. What teachers and instructors can expect A robust, readytouse assembly that supports handson learning of projectile motion, collision mechanics, and measurement techniques. Clear, repeatable results that enable practical data analysis and classroom discussion. An apparatus that emphasizes experimental procedure and interpretation without added complexity. Note All component descriptions, numeric specifications and functional details are provided as part of the experimental apparatus and are consistent with the supplied product information.