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Physics 8 Online
Hallsville:

Which has more momentum? A. An ant crawling back to its anthill B. A mouse scurrying to its den C. A fox sitting lazily by a pond D. A deer grazing in the grass

justus:

No direct answers

justus:

It is against the rules

Isry:

It erased the last part of my answer. It’s scurrying back to its den as the answer because a deer grazing is not really moving, neither is a fox lazily sitting, an ant crawling is moving but the word scurrying implies more speed than the word crawling does.

Hallsville:

Thanks

justjm:

Isry is correct but the explanation would not be obtained by the speed. We cannot assume speed with the adjectives. Rather, you would want to compare the mass. Recall that the formula for momentum is \(\text{p=mv}\) You can conclude that p∝m and p∝v. The mass of a mouse is much greater than that of an ant. Hence, the momentum would be greater.

Isry:

Ah it’s a physics question. I was thinking in terms of etymology.

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