A (2.0-mathrm{kg}) cart and an (8.0-mathrm{kg}) cart are connected by a relaxed, horizontal spring of spring constant
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A \(2.0-\mathrm{kg}\) cart and an \(8.0-\mathrm{kg}\) cart are connected by a relaxed, horizontal spring of spring constant \(300 \mathrm{~N} / \mathrm{m}\). You pull the \(8.0-\mathrm{kg}\) cart with some constant horizontal force. The separation between the carts increases for a short time interval, then remains constant as you continue to pull and the spring is stretched by \(0.100 \mathrm{~m}\).
(a) What pulling force did you exert?
(b) If you instead pull the \(2.0-\mathrm{kg}\) cart, what force must you exert to get the same stretch in the spring?
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