A spring with a 4-kg mass has natural length 0.8 m and is maintained stretched to a length of 1.2 m by a force of 25.6 N. If the spring is compressed to a length of 0.6 m and then released with zero velocity, find the position x ( t ) of the mass at any time t.

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25% 25%25%25%

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41 42 43 44 45 46 47 48 49 50

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41 42 43 44 45 46 47 48 49 50

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3. 4.

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41 42 43 44 45 46 47 48 49 50

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25% 25%25%25%

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21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40

41 42 43 44 45 46 47 48 49 50

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25% 25%25%25%

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21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40

41 42 43 44 45 46 47 48 49 50

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25% 25%25%25%

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40

41 42 43 44 45 46 47 48 49 50

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