Physics Review Question Unit: Energy Year: 1988 Question#: 14 Question: What is the spring constant of a spring of negligible mass which gained 8 joules of potential energy as a result of being compressed 0.4 meters? (1 ) 100N/m (2 ) 50N/m (3 ) 0.3N/m (4 ) 40N/m What is this question really asking? Explanation by: Cory V [ Return to question menu ] Answer 1 100N/M CORRECT By using PEs=1/2KX2 you can plug in the potential energy and change in spring length from its original equalibrium position to find what the constant is. return to top Answer 2 50N/M INCORRECT This answer would result if you left the spring constant as 1/2 the potential energy Use this formula more carefully. PEs=1/2KX2 return to top Answer 3 0.3N/M INCORRECT Try using PEs=1/2KX2 return to top Answer 4 40N/M INCORRECT Try using PEs=1/2KX2 return to top What's this question really asking? If a spring is compressed from its origional length of .4 meters ,it gains 8 Joules of potential energy; what is its' spring constant? return to top |
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