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수학동아 - 폴리매스
함께 풀고 싶은 문제
창의력을 기를 수 있는 수학 문제 또는 퍼즐을 내는 곳입니다.
delta
2019.11.12 06:34
조회 946
남자 앞에는 바닥으로부터 400cm 높이에 있는 줄에 매달려 있는 오뚝이가 1개 있다.
줄의 길이는 230cm이다.
남자는 오뚝이를 던진까 말까 고민하고 있다.
오뚝이를 던지면 포물선을 그리며 날아간다.
남자가 오뚝이를 던질 수 있는 높이는 170cm 높이이다.
던지는 순간 오뚝이의 진행방향은 바닥과 평행하다.
남자는 오뚝이를 각도 80도까지 던질 수 있다.
남자의 눈높이는 180cm이다.
이때, 최고각도를 첫번쨰로 찍고 나서 돌아올 때 눈높이와 오뚝이의 높이가 같아지게 되는 시간은 몇 초 뒤인가?
답은 소수점 3자리까지
(단, 중력상수는 9.8이다. 공기저항은 무시한다.)
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오뚝이~ 준비!
오뚝이~ 발사!
던질까 말까<퍽
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K→C≡N
Lv.11
2019.11.12 15:20
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오뚝이 X
오뚜기 O
즉
오뚜기 준비~
오뚜기 발사~
먹을까 말까 < 퍼퍽
좋아요0
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로보카폴리
Lv.11
2019.11.13 08:48
좋아요0
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던질까 말까 던질까 말까
던질까 말까 던질까 말까
던던던던 던져!
지금 바로
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