## Answers

Problem 3.

From the figure, it is evident that all the springs K_{1} , K_{2} and K_{3} are connected in parallel, hence equivalent spring constant :

K_{eq} = K_{1} +K_{2} + K_{3}

Now,

Problem 4.

By applying energy method,

KE + PE = Constant

mg = 5 N

Taking g = 10 m/s^{2}.

m = 5/10 = 0.5 kg

k = 400 N/m

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Kc A,

dt

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dt、2

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rメ0

4m

4m

400 = V200 = 14.142Hz 4 0.5

.
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