Q1: What is a three wire suspension apparatus used for?
A three wire suspension apparatus is used to study the equilibrium of forces in a concurrent coplanar wire system. Students apply a known load to a common node ring, read the tension in each wire from integrated spring balances, and verify that the resolved horizontal and vertical force components sum to zero — confirming static equilibrium. The apparatus also demonstrates the redundant force condition that arises when one wire is vertical.
Q2: What is a redundant vertical tie, and how does the FX-503 demonstrate it?
In a three-wire suspension system where one wire is vertical, the vertical equilibrium equation alone cannot uniquely determine all three wire tensions — the system is statically indeterminate. The vertical wire is described as redundant because its force cannot be found from equilibrium conditions alone. The FX-503 makes this condition directly observable by allowing students to measure all three wire tensions simultaneously and compare them against values predicted by equilibrium equations.
Q3: How is wire tension measured in the FX-503?
Each of the three wires incorporates a direct-reading linear spring balance with a range of 0–10 kg and a graduation of 50 g. The spring balances are mounted in-line along each wire, so the tension in each wire is read directly from its balance without calculation. This allows all three tensions to be recorded simultaneously at each load increment.
Q4: What is the difference between the FX-503 and the FF-1103?
Both units cover the same experimental objectives — three wire suspension, force equilibrium, and redundant tie investigation — and share the same core specifications. The FX-503 is designated within the FrizoDynamics FX series, while the FF-1103 belongs to the FF series. Buyers should confirm the applicable series with SCIENTICO at the time of enquiry to ensure the correct variant is supplied.
Q5: What is included in the scope of delivery for the FX-503?
The FX-503 is supplied as a complete experimental kit including: one experimental unit (free-standing backboard, three wires with in-line spring balances and threaded rod adjusters, node disk, universal ring, and load hanger), three spring balances (0–10 kg, 50 g graduation), one node disk, one set of calibrated weights (1 x 0.5 N hanger, 2 x 5 N, 2 x 2 N, 2 x 1 N, 2 x 0.5 N), and one instructional manual for students and lecturers.
