Sturdy, smooth rolling dynamics cart, with universal smartphone adapter.

• Classroom Hall's carriage designed for use with all types of inclined planes
• Durable plastic body with machined aluminum wheels
• Roomy well for additional masses (masses not included)
• Utilize the power of a smartphone with the optional adapter

This Hall's carriage features machined aluminum wheels and axles mounted on hardened steel cone bearings for minimum friction and long life. For use with all types of inclined planes.

The unique adapter holds a smartphone securely for motion experiments. Using an app of their own choosing, users can graph acceleration and velocity.