10 Z 4, pp. 1085∼1093
¡
;5 8 û ö n ÚP õ m Í U Ê Ý] K ¡ w Ê Ý" e8 ý Ì ¦ RÅ k ÈI í Ä 4 G È Ó Þ R w
 6
Ò - > ¸ · T , > * å · * > ¹# Ü
s
o# @ / < Æ § õ < Æ §¹ ¢ ¤ õ , " fÖ ¦ 120-750
(2010¸ 8 Z 4 2{ 9 ~ Ã Î6 £ §, 2010¸ 10 Z 4 4{ 9 Ã º& ñ : r ~ Ã Î6 £ §, 2010¸ 10 Z 4 15{ 9 > F S X & ñ )
"
é
¶ d § 4 É r ¦1 p x < Æ § Ó ü t o x 9 t ½ ¨õ < Æ §õ " fü < @ / < Æ § Ó ü t o §F \ " f Ó ü t ^ _ " é ¶î r1 l x` ¦ [ O " î ½ + É M :
´ ú
§s 6 x ÷ & H Ó ü t o 6 x # Qs . Õ ª Q < ÆÒ q t, § ü < @ / < Æ §\ " f { 9 ì ø ÍÓ ü t o \ ¦ Ø Ôu H §Ã º[ þ t ¸ s \
'
aº ) a ¸> h¥ Æ ` ¦ t ¦ e ` ¦ à º e . " é ¶ d § 4 É r " é ¶î r1 l x \ " f r ý a³ ð> \ " f Ó ü t ^ _ î r1 l x` ¦ [ O " î l
0 AK © Ü ¼ Ð ¸{ 9 ô Ç j Ë µs ¦, z ´] j Ð > r F t · ú § H j Ë µs . © _ j Ë µ " é ¶ d § 4 \ @ /K ª ô Ç
¸> h¥ Æ s > r F H ë ß p u ¦1 p x < Æ § x 9 @ / < Æ § Ó ü t o Õ þ \ " f " é ¶î r1 l x [ O " î r " é ¶ d § 4 s # Qb G> 6 x ÷ & ¦ e
H t q § ì r$ 3 s ' ÷ &# Q ô Ç . & ³F 6 x ¦ e H ² D G ? /ü @ Ó ü t o , t ½ ¨õ < Æ §õ " fü < @ / < Æ § F
\ ] jr ) a " é ¶ d § 4 Â Òì r` ¦ ì r$ 3 % i . : r ½ ¨\ " f ì r$ 3 ô Ç ² D G ? /ü @ @ / < Æ { 9 ì ø ÍÓ ü t o §F 20| _ â Ä
º " é ¶ d § 4 ` ¦ 6 x # " é ¶î r1 l x` ¦ [ O " î ô Ç â Ä º ì r$ 3 ô Ç §F _ 25 %s ¦ §F ^ \ " f " é ¶ d § 4 ` ¦ )
/ å L t · ú § 6 x t ´ ú ô Ç ¦ ] j H §F H 75 % s . ì ø Í ¸ H ² D G ? / ¦1 p x < Æ § Ó
ü
t o , t ½ ¨õ < Æ II §õ " f\ " f H " é ¶ d § 4 _ & ñ _ ü < " é ¶ d § 4 õ ' aº ) a Ó ü t o & ³ © ` ¦ 2-4 ` s t \ 5 g [ O
"
î ¦ e . ¦1 p x < Æ §\ " f C î r " é ¶ d § 4 > h¥ Æ s ´ ú § É r @ / < Æ { 9 ì ø ÍÓ ü t o §F \ " f H / å L ÷ &# Q e t · ú §l M
:ë H \ < ÆÒ q t[ þ t \ > t ° ú 1 p x` ¦ Ä »µ 1 Ͻ + É Ã º e . Õ ª QÙ ¼ Ð ¦1 p x < Æ §ü < @ / < Æ §\ " f < ÆÒ q t[ þ t \ > " é ¶î r 1
l
x` ¦ [ O " î ½ + É M : > $ í e H ` ¦ É r t ¸~ ½ ÓZ O \ @ /ô Ç ¦¹ 1 Ïs 9 כ ¹ .
Ù þ
d # Q: " é ¶ d § 4 , ½ ¨d § 4 , " é ¶î r1 l x, Ó ü t o §¹ ¢ ¤, §õ " f
Comparison of the Conceptual Description of the Centrifugal Force in Physics and Earth Science Textbooks Used in Korea
Insik Hahn ∗ · Shin Young Lee · Bo Kyung Min
Department of Science Education, Ewha Woman’s University, Seoul 120-750 (Received 2 August, 2010 : revised 4 October, 2010 : accepted 15 October, 2010)
Along with the centripetal force, the centrifugal force is a term widely used in high school physics, earth science textbooks and college textbooks to explain circular motions. However, many students and teachers can have misconceptions. The centrifugal force is not a real force, and historically the term ðcentrifugal forceñ has been used because of an incorrect understanding of the circular motion.
Because it can create unnecessary misconceptions for students, we examine physics textbooks that are widely used in high schools and colleges in Korea. Our study indicates that all the high school textbooks mention the centrifugal force whereas 75 % of the college introductory physics textbooks either do not use the term or recommend not using the term. Because of the difficulties associated with the centrifugal force, i.e. it can give wrong conceptual ideas to high school students and first year college students, more careful introduction of the force is needed.
PACS numbers: 01.40.Ej, 01.40.Fk
Keywords: Centrifugal force, Centripetal force, Circular motion, Physics education, Textbook
∗