Question: 9 . Two clever kids use a huge spring with ( k = 8 9 0 mathrm { ~N } / mathrm

9. Two clever kids use a huge spring with \( k=890\mathrm{~N}/\mathrm{m}\) to launch their toboggan at the top of a 9.5 m high hill. The mass of the kids plus toboggan is 80 kg . The coefficient of kinetic friction between the toboggan and the slope is 0.05.
If the kids manage to compress the spring 2.6 m , what will be their speed at the bottom of the hill?
9 . Two clever kids use a huge spring with \ ( k

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