select * from tbl_content where devision_sn = 79 and devision = 35 Discovery English
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  Learning Times > µ¶ÇØ/¹ø¿ª > Discovery English
 
  Date : 2010-08-10
An unusual museum
 
 

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( as long as, Once, the energy of motion, less and less )
 
Imagine that the car at the top begins to move down the mountain.
»ê²À´ë±â¿¡ ÀÖ´Â Â÷°¡ ¿òÁ÷À̱⠽ÃÀÛÇÑ´Ù°í »ý°¢Çغ¸¼¼¿ä.
 
As this car moves down the mountain, it has (1)____________________ potential energy.
Â÷°¡ »ê ¾Æ·¡·Î ¿òÁ÷À̸é À§Ä¡¿¡³ÊÁö´Â Á¡Â÷ °¨¼ÒÇÕ´Ï´Ù.
 
However, energy cannot be lost. Then where does it go?
±×·¯³ª ¿¡³ÊÁö´Â ¾ø¾îÁö´Â °ÍÀÌ ¾Æ´Õ´Ï´Ù. ±×·¯¸é ÀÌ ¿¡³ÊÁö´Â ¾îµð·Î °¡´Â °ÍÀϱî¿ä?
 
The car moving down the mountain now has kinetic energy.
»ê ¾Æ·¡·Î ³»·Á¿Â Â÷´Â ÀÌÁ¦ µ¿·Â¿¡³ÊÁö¸¦ °®°Ô µÈ °ÍÀÌÁÒ.
 
Kinetic energy is (2)________________________.
µ¿·Â¿¡³ÊÁö¶õ ¿îµ¿¿¡³ÊÁö¸¦ ¸»ÇÕ´Ï´Ù.
 
As the car moves down the mountain, its potential energy changes into kinetic energy.
Â÷°¡ »ê ¾Æ·¡·Î ³»·Á¿À¸é¼­ À§Ä¡¿¡³ÊÁö´Â ¼­¼­È÷ µ¿·Â¿¡³ÊÁö·Î ÀüȯµÈ °ÍÀÌÁÒ.
 
The kinetic energy from the car moving down the mountain pulls the second car up the mountain.
»ê ¾Æ·¡·Î ³»·Á¿Â Â÷ÀÇ µ¿·Â¿¡³ÊÁö´Â ´Ù¸¥ ÇϳªÀÇ Â÷¸¦ »ê À§·Î ¿Ã·ÁÁÖ´Â °ÍÀÌÁÒ.
 
As the second car moves up the mountain, its potential energy increases.
µÎ ¹øÂ° Â÷°¡ »ê À§·Î ¿Ã¶ó°¡¸é À§Ä¡¿¡³ÊÁö´Â Áõ°¡ÇÏ°Ô µË´Ï´Ù.
 
(3)__________ the second car reaches the top, it will have the same potential energy as the other car did.
ÀÏ´Ü µÎ ¹øÂ° Â÷°¡ ²À´ë±â¿¡ µµÂøÇÏ¸é ±×°ÍÀº ù ¹øÂ° Â÷°¡ °¡Á³´ø À§Ä¡¿¡³ÊÁö¿Í °°Àº ¾çÀÇ ¿¡³ÊÁö¸¦ °¡Áö°Ô µË´Ï´Ù.
 
The potential energy in the second car can start the ride all over again.
µÎ ¹øÂ° Â÷ÀÇ À§Ä¡¿¡³ÊÁö´Â ¿ª½Ã ÀÌ ¿îÇàÀ» ¹Ýº¹ÇÏ°Ô ÇØ ÁÝ´Ï´Ù.
 
The cars can keep moving up and down (4)________________ changes occur between kinetic energy and potential energy.
µ¿·Â¿¡³ÊÁö¿Í À§Ä¡¿¡³ÊÁö°¡ ¹Ýº¹ÀûÀ¸·Î ÀüȯµÇ±â¸¸ Çϸé Â÷´Â »êÀÇ À§¿Í ¾Æ·¡¸¦ °è¼Ó À̵¿ÇÏ°Ô µÇ´Â °ÍÀÔ´Ï´Ù.
  
There is another ride you might recognize that depends on changes between kinetic energy and potential energy.
±×¸®°í ÀÌ·¸°Ô À§Ä¡¿¡³ÊÁö¿Í µ¿·Â¿¡³ÊÁöÀÇ ÀüȯÀ» ÀÌ¿ëÇÑ °ÍÀ» ±ú´ÞÀ» ¼ö ÀÖ´Â ¶Ç ´Ù¸¥ Å» °ÍÀÌ ÀÖ½À´Ï´Ù.
 
However, this one moves much faster than a funicular railway!
±×·±µ¥ À̰ÍÀº ÄÉÀ̺íÄ« º¸´Ù ÈξÀ »¡¸® ¿òÁ÷Àδä´Ï´Ù.
 
Changes between potential energy and kinetic energy keep the cars moving
on a roller coaster.
À§Ä¡ ¿¡³ÊÁö¿Í µ¿·Â¿¡³ÊÁöÀÇ ÀüȯÀº ÀÌ ·Ñ·¯ÄÚ½ºÅ͸¦ ¿òÁ÷ÀÌ°Ô ÇÕ´Ï´Ù.
 
Answers
(1) less and less
(2) the energy of motion
(3) Once
(4) as long as
 

 
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