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Academics – Applied Mechanics : 2022/OCT/06
Question

Q6. A 30 kN truck moving at 6 km/h is brought to rest by a spring-loaded buffer that is compressed by a total of 200 mm during the process. The buffer springs are made from 20 mm diameter alloy wire with 20 coils of 200 mm mean diameter.

Calculate the minimum number of springs that are fitted to the buffer. (16)

Note: Modulus of Rigidity for spring wire= 100 GN/m2

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