{"type":"multi-choice","id":"75997","dataJson":{"prompt":"Is the following statement True or False? The force applied to a spring is proportional to its extension.","options":[{"key":"0.9270735631618295","label":"True","value":"True"},{"key":"0.8286574776406594","label":"False","value":"False"}],"limitChoices":{"max":1,"min":1,"sameNumberAsCorrectAnswers":true},"validResponse":["True"]}}

{"type":"fill-in-blanks","id":"75998","dataJson":{"key":3,"prompt":"Fill out the blanks","options":{"plastic":[{"label":"stress-strain","value":"stress-strain"},{"label":"plastic","value":"plastic"},{"label":"compression","value":"compression"}],"reversible":[{"label":"reversible","value":"reversible"},{"label":"permanent","value":"permanent"},{"label":"irreversible","value":"irreversible"}]},"template":"Complete the following sentence: Elastic deformation is {{reversible}} and {{plastic}} deformation is irreversible.","validResponse":{"plastic":"plastic","reversible":"reversible"}}}

{"type":"multi-choice","id":"75999","dataJson":{"key":12,"prompt":"What are the units used for the spring constant?","options":[{"key":"0.32458259757192154","label":"N/m","value":"N/m"},{"key":"0.17707266761564322","label":"N","value":"N"},{"key":"0.8404282200367587","label":"m","value":"m"}],"limitChoices":{"max":1,"min":1},"validResponse":["N/m"]}}

{"type":"multi-choice","id":"76000","dataJson":{"key":15,"prompt":"What is the spring constant of a spring that needs a force of 5 N to be compressed from a length of 45 cm to a length of 35 cm?","options":[{"key":"0.49945319336774185","label":"5 N/m","value":"5 N/m"},{"key":"0.011594163114832967","label":"0.1 N/m","value":"0.1 N/m"},{"key":"0.27169188850836823","label":"0.5 N/m","value":"0.5 N/m"},{"key":"0.18710727526661186","label":"50 N/m","value":"50 N/m"}],"limitChoices":{"max":1,"min":1},"validResponse":["50 N/m"]}}

{"type":"multi-choice","id":"76001","dataJson":{"key":4,"prompt":"If a spring has a constant of 20 N/m and a force of 6 N is applied to it, how far will the spring extend?","options":[{"key":"0.48068873967867487","label":"3.33 m","value":"3.33 m"},{"key":"0.7447067833684284","label":"0.3 m","value":"0.3 m"},{"key":"0.9466958173307302","label":"120 m","value":"120 m"},{"key":"0.9099884329445185","label":"0.15 m","value":"0.15 m"},{"key":"0.2933823217524836","label":"15 m","value":"15 m"}],"limitChoices":{"sameNumberAsCorrectAnswers":true},"validResponse":["0.3 m"]}}

Answer incorrect

Look at the slide below to work out the answer.