Physics Review Question Unit: mechanics Year: 1997 Question#: 19 Question: The graph below shows the relationship between the elongation of a spring and the force applied to the spring causing it to stretch. What is the spring constant for this spring? (1 ) 0.020 N/m (2 ) 2.0 N/m (3 ) 25 N/m (4 ) 50. N/m What is this question really asking? Explanation by: Becky G [ Return to question menu ] Answer 1 0.020 N/m INCORRECT Try chosing a point on the graph and using the formula F=kx and solving for k. return to top Answer 2 2.0 N/m INCORRECT Try chosing a point on the graph and using the formula F=kx and solving for k. return to top Answer 3 25 N/m INCORRECT 25 N/m would be only half the newtons to make the strtch be one meter. Try chosing a point on the graph and using the formula F=kx and solving for k. return to top Answer 4 50. N/m CORRECT By looking at the graph you can tell that the line passes through the point 50. N the same time it passes through the point 1.00 m. Therefore 50. N/m is the correct answer. The other approach would be to choose a point on the graph and use the formula F=kx and solve for k. return to top What's this question really asking? Can you read a graph and do you know what spring constant means? return to top |
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