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Function: driver

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Function: _error_handler

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
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Function: model

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
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Function: getFloatingMyInfo

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Line: 559
Function: get_footer

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/index.php
Line: 315
Function: require_once

수학동아 - 폴리매스
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[문장제 문제&개념응용] 간단한 물리
아엘 2021.08.09 05:11 조회 347
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페이스북 트위터 카카오톡 카카오스토리 네이버블로그 네이버밴드

마찰이 없는 수평선 위에서 용수철 상수가 300≤k≤500인 용수철이 있다. 이 용수철에 질량이 0.4kg인 물체를 수평 방향으로 20cm만큼 압축시켰다가 가만히 놓았더니 물체가 경사면을 따라 올라가 높이가 2~3m 사이인 구간에서 순간적으로 정지하였다. 위의 상황을 만족시키는 k의 범위를 구하여라.

(중력 가속도=10m/s^2, 모든 마찰, 공기 저항은 무시한다.)

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