Solve the problem.The number of centimeters, d, that a spring is compressed from its natural, uncompressed position is given by the formula d = , where W is the number of joules of work done to move the spring and k is the spring constant. Solve this equation for W. Use the result to determine the work needed to move a spring 9 centimeters if it has a spring constant of 0.2.

A. W = 2d2k; 32.4 joules
B. W = ; 8.1 joules
C. W = ; 810 joules
D. W = ; 0.8 joules


Answer: B

Mathematics

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