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If a load of 1 kg stretches a cord by 1 2cm wha... - JAMB Physics 2012 Question

If a load of 1 kg stretches a cord by 1.2cm, what is the force constant of the cord? {g=10ms-2}
A
866Nm-1
B
833Nm-1
C
769Nm-1
D
667Nm-1
correct option: b

K = (\frac{F}{e})

K = (\frac{1 \times 10}{\frac{0.2}{100}})

K = (\frac{10}{12} \times \frac{1000}{1})

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