PHY191
Question: A spring 20.0 cm long is stretched to 25.0 cm by a load of 50N.What will be its length when stretched by 100N,assuming that the elastic limit is not exceeded?
Answer: 30.0 cm
Question: When a load of 2.2 N is applied to a spiral spring of length 12 cm, it extended to 13.2 cm. What load would produce a length of 13.4 cm, provided the elastic limit is not exceeded?
Answer: 2.6 N
Question: A spring has a natural length of 0.64m.It extended 0.024 m when a load of 3.6 N is applied. What would bring about an extension of 0.02m.
Answer: 3 N
Question: A spiral spring is extended by 0.02 m when a load of 150 g is attached to it. What is the force constant of the spring? Take g = 9.8 m/sA2.
Answer: 2.44 N
Question: A force of 6.2 N applied to the spiral spring of length 9.2 cm causes it to extend by 0.034 m. What is the length of the spiral spring when a force of 4.6 N is applied to it provided the elastic limit is not exceeded?
Answer: 11.72 cm
Question: A load of 1.8 N applied to a spiral spring of natural length 12cm produces an extension of 0.022m.What is the stiffness of the spring?
Answer: 81.8 N/m
Question: In an experiment to determine the force constant of a spiral spring, the force on the spring is described by Mg = sx, where M, g, s and x have their usual meaning. On what condition would the equation be true?
Answer: The measurement should be carried out with a heavy load and a small amplitude.
Question: A spring of natural length 1.5 cm is extended 0.0050 m by a force of 0.8N.What will its length be when the applied force is 3.5 N?
Answer: 1.52 m
Question: In an experiment to determine the force constant of a spiral spring, the extension x is measured as a function of the load applied. If a graph of load M is plotted against extension x according to the equation Mg = sx, where M, g, s and x have their usual meaning. Assume g = 9.8 m/sA2. What is the stiffness of the spring if the slope of the graph obtained is 1.88kg/m?
Answer: 18.42 N/m
Question: When a spiral spring carries a mass M in an experiment, the force on the spring is described by Mg=sx provided the
spring obeys Hooke’s law and
extension X is measured as a function of the load M applied. How is Hooke’s confirmed for this spring?
Answer: A graph of load against extension is a straight line from the origin
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