Elasticity and Hooke's lawIB MYP Physics: Mind map

Exam questions on Elasticity and Hooke's law

1. A trampoline manufacturer in Melbourne joins the mat to the frame with steel springs. Each spring has a natural length of 20 cm. In a test, a weight of 12 N is hung from one spring and its length becomes 26 cm. The spring is not stretched beyond its limit of proportionality.
   The same spring is stretched by a weight of 18 N. Calculate the extension in cm.2 marks
2. A workshop technician in Kuala Lumpur tests a steel spring by hanging increasing loads from it. Up to 15 N the extension is directly proportional to the load and the spring returns to its original length when the load is removed. A load of 25 N takes the spring beyond its elastic limit.
   Explain what happens to the length of the spring after (i) a 10 N load is removed and (ii) the 25 N load is removed.2 marks
3. A student in Vancouver hangs loads from a spring and measures the extension each time. A 2.0 N load gives an extension of 4.0 cm, a 4.0 N load gives 8.0 cm, a 6.0 N load gives 12.0 cm, an 8.0 N load gives 16.0 cm and a 10.0 N load gives 22.0 cm.
   Calculate the spring constant of the spring in N/m using the first four results.3 marks