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There are multiple questions all related to the same problem. I want to make sure I get them all correct, so any help would be much appreciated. I need this by tonight.
A box slides at a constant speed down a rough inclined plane whose angle is 30 degrees above the horizontal. There are no ropes or outside agents pushing or pulling on it.
1. The work done by the normal force is:
* positive
* negative
* zero
* not enough information
2. The work done by friction is:
* positive
* negative
* zero
* not enough information
3. The work done by the weight is:
* positive
* negative
* zero
* not enough information
4. The total work (or net work) done on the box is:
* positive
* negative
* zero
* not enough information
My thoughts are that the work done by the normal force is positive, the work done by weight is negative, and the work done by friction is negative, which leaves total work to be negative. Please tell me if I am wrong, and where I am wrong.
A box slides at a constant speed down a rough inclined plane whose angle is 30 degrees above the horizontal. There are no ropes or outside agents pushing or pulling on it.
1. The work done by the normal force is:
* positive
* negative
* zero
* not enough information
2. The work done by friction is:
* positive
* negative
* zero
* not enough information
3. The work done by the weight is:
* positive
* negative
* zero
* not enough information
4. The total work (or net work) done on the box is:
* positive
* negative
* zero
* not enough information
My thoughts are that the work done by the normal force is positive, the work done by weight is negative, and the work done by friction is negative, which leaves total work to be negative. Please tell me if I am wrong, and where I am wrong.