Barron's Physics Answer Errors

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1

<p>Diagnostic test, Qn 56</p>

<p>An object witha constant mass rests on a smooth and perfectly horizontal table. If a horizontal force F is applied, acceleration a results. If F is doubled without changing the direction, what will be the effect(s) on the acceleration?</p>

<p>I. The acceleration will remain the same.
II. The acceleration will be doubled.
III. The acceleration will decrease.
IV. The acceleration will increase but not double</p>

<p>A) I, II, and III only.
B) I and III only
C) II and IV only
D) IV only
E) none of the above.</p>

<p>Answer provided is C. So, the acceleration will be doubled by will not be doubled. Wonderful... </p>

<p>Anyone else have errors?</p>

2

<p>barrons sucks</p>

3

<p>yea, i didnt catch that mistake... it's E right? (the real answer... not the barron's one)</p>

4

<p>Yeah, there are quite a few mistakes in the barron's.... probably the most crucial one would be the first law of thermodynamics ... they mixed up the negative/positive work. Also, aparantly, a cylinder can be "insulted"</p>

5

<p>Go PR! </p>

<p>errors abound</p>

6

<p>This may just be a minor typo or something, but there are so many other serious mistakes. For example, in the chapter on electromagnetism and all questions on the topic, they have confused electron flow with conventional current. All the rules are supposed to be for electron flow, and they have given for conventional current, resulting in all their answers being the other way round.</p>

<p>Wonder how many more mistakes they have made.</p>

7

<p>Yeah, I saw this one but I thought as long as I perceive the thing its okay...
I found couple errors, but still, Barron is the best.</p>