An athlete stretches a spring an extra 40.0 cm beyond its initial length. How much energy has he transferred to the spring, if the spring constant is 52.9 N/cm?
A) 423 J B) 423 kJ C) 4230 kJ D) 4230 J
Question 2
Which, if any, of the following statements concerning the work done by a conservative force is NOT true?
A) It is independent of the path of the body and depends only on the starting and ending points.
B) When the starting and ending points are the same, the total work is zero.
C) It can always be expressed as the difference between the initial and final values of a potential energy function.
D) All of the above statements are true.
E) None of the above statements are true.
Guo Xi, Early Spring.
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