Jumbo Centripetal Force Apparatus, University II Model || 43-

Jumbo Centripetal Force Apparatus, University II Model

The University II Deluxe Centripetal Force Apparatus is a precision instrument for the quantitative measurement of centripetal force and moment of inertia. Designed for advanced college and university physics labs, it enables students to collect, analyze, and compare accurate experimental data, making it ideal for studying the dynamics of rotational motion.

How It Works

A mass is suspended from one end of a horizontal bar supported by a vertical shaft. As the shaft is spun, the mass swings outward due to centripetal motion and is opposed by the restoring force of a coiled spring attached to the shaft.

The speed of rotation is easily determined by visually counting revolutions per minute. At each specific speed, the mass assumes a measurable radius of rotation indicated by a reference pointer. From these conditions, students calculate the centripetal force and compare it with the static force required to displace the mass to the same radius using a spring scale or weight hanger and the included ball-bearing pulley.

Design Features

• Thumb-and-forefinger control using a knurled lower shaft for smooth torque application
• Safe, easily countable rotational speed with spring and mass optimized for student use
• Counterbalanced crossbar for stability and precision
• 15 mm diameter support shaft mounted in ball bearings to minimize wobble and friction
• Adjustable radius indicator with approximately 10 cm range
• Variable mass capability by adding slotted weights to the suspended mass
• Heavy steel base with four non-slip rubber feet
• Detailed instructions included

Variable Inertia Bar Accessory

The included Variable Inertia Bar demonstrates how the torque required to accelerate a flywheel depends on its moment of inertia rather than its mass. The steel bar features heavy adjustable masses on each end and can be clamped in various positions to vary inertia.

When the accessory is mounted on the shaft, the system may be accelerated by a weight and string (weight not included). By observing the change in the weight’s position over time, students can calculate the system’s moment of inertia.