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[일반물리학]할리데이 일반물리학 6장풀이

저작시기 2006.03 | 등록일 2006.03.30 파일확장자 어도비 PDF (pdf) | 36페이지 | 가격 1,200원

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142 CHAPTER 6 FORCE AND MOTION – II
CHAPTER 6
Answer to Checkpoint Questions
1. (a) zero (because there is no attempt at sliding); (b) 5 N; (c) no; (d) yes
2. (a) (10 N); (b) decreases; (c) decreases
3. greater
4. (a) a downward, N upward; (b) a and N upward
5. (a) 4R1; (b) 4R1
6. (a) same; (b) increases; (c) increases
Answer to Questions
1. they slide at the same angle for all orders
2. (a) same; (b) increases; (c) increases; (d) no
3. (a) upward; (b) horizontal, toward you; (c) no change; (d) increases; (e) increases
4. (a) increases; (b) increases; (c) decreases; (d) decreases; (e) decreases
5. the frictional force fs is initially directed up the ramp, decreases in magnitude to
zero, and then is directed down the ramp, increasing in magnitude until the mag-
nitude reaches fs;max; thereafter, the magnitude of the frictional force is fk, which
is a constant smaller value

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