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Q.1: A(20 kg) weight suspended from the end of a vertical spring stretches it 20 cm....

Q.1: A(20 kg) weight suspended from the end of a vertical spring stretches it 20 cm. If an
external force of (20 cos7t) is applied to the spring. Find the position of the weight at any
time if initially the weight is pulled down 15 cm and given an initial velocity of 105 cm/sec
downward? Assuming no air resistance.

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