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A spring of force constant 1500Nm-1 is acted upon by a constant force of 75N....

Physics
JAMB 1991
A spring of force constant 1500Nm-1 is acted upon by a constant force of 75N. Calculate the potential energy stored in the string
  • A. 1.9J
  • B. 2.8J
  • C. 3.45J
  • D. 0.43J
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Correct Answer: Option A
Explanation
P.E = \(\frac{1}{2}\)Fe

= \(\frac{1}{2}\)\(\frac{F}{K}\)

= \(\frac{1}{2}\) x \(\frac{75 \times 75}{1500}\)

= 1.9J
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