anonymous
  • anonymous
For which of the following is the velocity constant (speed/direction does not change)? A cat escaping a dog by running in a straight line and then up a tree at a constant speed of 30 mph. A cat escaping a dog by running in a straight line away from the dog and slowing down when danger is gone. A cat escaping a dog by running at a constant speed around and around the house until the dog gets bored. A cat ignoring the dog by sitting perfectly still. i think its the one where the cat went up the tree but was wondering if it could be the last one
Physics
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anonymous
  • anonymous
For which of the following is the velocity constant (speed/direction does not change)? A cat escaping a dog by running in a straight line and then up a tree at a constant speed of 30 mph. A cat escaping a dog by running in a straight line away from the dog and slowing down when danger is gone. A cat escaping a dog by running at a constant speed around and around the house until the dog gets bored. A cat ignoring the dog by sitting perfectly still. i think its the one where the cat went up the tree but was wondering if it could be the last one
Physics
jamiebookeater
  • jamiebookeater
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At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

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SolomonZelman
  • SolomonZelman
Running up a tree after running straight is a change in direction thus, although the speed is same 30mph, the velocity is different.
SolomonZelman
  • SolomonZelman
Now, in choice B, the cat is slowing down after having escaped from the dog. This is also a change in velocity (because the speed decreases).
SolomonZelman
  • SolomonZelman
When the cat is sitting still the whole time, its velocity is 0.0mph the entire time. That means the velocity doesn't change

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SolomonZelman
  • SolomonZelman
And when the cat is running around the house, the cat is changing direction (thus velocity is different). (This is relevantly a circular motion, and acceleration is a non-zero constant, and thus veloicty of course isn't same)
SolomonZelman
  • SolomonZelman
hope that helps.
anonymous
  • anonymous
yea thx, i though it could be the last one but didnt know

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