JAMB Physics 2018 Objective — Question 7
Question 7 of 38 from the Joint Admissions and Matriculation Board (JAMB) Physics 2018 Objective paper, with the correct answer and a full explanation.
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An object weighing 0.6N is hung on a spiral spring and causes it to extend by 6.0cm. The object is removed and a log of wood replacing it causes the spring to extend by 10cm. What is the weight of the wood?
- A. 0.6N
- B. 0.4N
- C. 0.67N
- D. 1.0NCorrect
Explanation
Using Hooke's Law: F=Ke, so K = 0.6/0.06 = 10N/m. Weight of wood = Ke = 10×0.10 = 1.0N.
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