person drags a sled across a frozen lake to town. The surface of the lake is quite smooth and slippery (so the friction from the ice can be neglected), but he has studded boots with nails driven through the soles (from the inside) so he can walk across the ice without slipping. As he nears his destination, he begins
person drags a sled across a frozen lake to town. The surface of the lake is quite smooth and slippery (so the friction from the ice can be neglected), but he has studded boots with nails driven through the soles (from the inside) so he can walk across the ice without slipping. As he nears his destination, he begins
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A person drags a sled across a frozen lake to town. The surface of the lake is quite smooth and slippery (so the friction from the ice can be neglected), but he has studded boots with nails driven through the soles (from the inside) so he can walk across the ice without slipping.
As he nears his destination, he begins to slow the sled down by pushing in a direction opposite the velocity of the sled. During this process, the work he is doing on the sled is:
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Positive |
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Not enough information is given |
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Negative |
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Zero |
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