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Консультация № 191805
19.11.2017, 21:16
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Уважаемые эксперты! Пожалуйста, ответьте на вопрос
решите пожалуйста задачу
Грузик, привязанный к нити длиной l=1м, описывает окружность в горизонтальной плоскости. Определить период Т обращения, если нить отклонена на угол φ = 60 от вертикали.
решите пожалуйста задачу
Грузик, привязанный к нити длиной l=1м, описывает окружность в горизонтальной плоскости. Определить период Т обращения, если нить отклонена на угол φ = 60 от вертикали.
Обсуждение
20.11.2017, 00:11
общий
это ответ
Здравствуйте, cot.ru!
Радиус описываемой грузом окружности [tnr]R=l[$183$]sin[$966$][/tnr]
Нормальное ускорение груза [tnr]aн=[$969$]2R=(2[$960$]/T)2R=4[$960$]2[$183$]l[$183$]sin[$966$]/T2[/tnr]
С другой стороны, центростремительное ускорение связано с углом отклонения от вертикали [tnr]tg[$966$]=aн/g
aн=g[$183$]tg[$966$]
T2=4[$960$]2[$183$]l[$183$]sin[$966$]/(g[$183$]tg[$966$])=4[$960$]2[$183$]l[$183$]cos[$966$]/g
T=2[$960$][$8730$](l[$183$]cos[$966$]/g)=2[$960$][$8730$](1м[$183$]cos60[$176$]/9,8м/с[sup]2[/sup])=1,42 с[/tnr]
Радиус описываемой грузом окружности [tnr]R=l[$183$]sin[$966$][/tnr]
Нормальное ускорение груза [tnr]aн=[$969$]2R=(2[$960$]/T)2R=4[$960$]2[$183$]l[$183$]sin[$966$]/T2[/tnr]
С другой стороны, центростремительное ускорение связано с углом отклонения от вертикали [tnr]tg[$966$]=aн/g
aн=g[$183$]tg[$966$]
T2=4[$960$]2[$183$]l[$183$]sin[$966$]/(g[$183$]tg[$966$])=4[$960$]2[$183$]l[$183$]cos[$966$]/g
T=2[$960$][$8730$](l[$183$]cos[$966$]/g)=2[$960$][$8730$](1м[$183$]cos60[$176$]/9,8м/с[sup]2[/sup])=1,42 с[/tnr]
21.11.2017, 08:40
общий
Спасибо а не скажете по какой таблицы найти чему равняются синусы и косинусы, и что такое ω, как его найти
21.11.2017, 18:57
общий
Адресаты:
cot.ru а не скажете по какой таблицы найти чему равняются синусы и косинусы
cot.ru что такое ω
[$969$]=[$966$]/t... - но лучше всего будет посмотреть в любом учебнике физики тему "Равномерное движение по окружности"
Об авторе:
С уважением
shvetski
С уважением
shvetski
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