Предмет: Физика, автор: Аноним

Подьемный кран равномерно поднимает груз со скоростью 0.4 мс. Какой массы был поднятый груз, если кран за 45 с выполнил работу 360 кДж?

Ответы

Автор ответа: LorentsА
0
Дано:
u=0,4м/с
t=45с
A=360000дж
Решение
A=FS=mgs => m=A:(gS)
u=s:t => S=ut=0,4x45=18м
m=360000:18=20000кг
Автор ответа: Аноним
0
Вообщем,у него не правильно,а у тебя правильно?
Автор ответа: LorentsА
0
посмотри, ты умножаешь скорость на время и на g, а скорость на время это s, то есть m=a:(Sg)
Автор ответа: LorentsА
0
все поняла, извини, я на g не умножила, ответ 2000, но запиши лучше формулы мои, у того чела вообще бред какой-то
Автор ответа: Аноним
0
Да я поняла,просто ты расписала,а он нет+не нашел S.
Автор ответа: Аноним
0
Хорошо.Благодарю))
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Engineering is a subject that ranges from large collaborations to small individual projects. Almost all engineering projects depend on some sort of financing agency: a company, a set of investors, or a government.
By its very nature engineering is connected with society and human behavior. Every product or construction used by modern society is influenced by engineering design. Engineering design is a very powerful tool to make changes to environment, society and economies, and its application brings with it a great responsibility. Many engineering societies have established codes of practice and codes of ethics to guide members and inform the at large.
Engineering projects can be subject for discussion. Examples from different engineering disciplines include the development of nuclear weapons, the design and use of sport utility vehicles and the extraction of oil. In response, some western engineering companies have enacted serious corporate and social responsibility policies.
Engineering is a key driver of human development. For example, Sub-Saharan Africa in particular has a very small engineering capacity. Therefore, many African nations are unable to develop infrastructure without outside aid. The main goal nowadays is to achieve sufficient engineering capacity to develop infrastructure and maintain technological development.
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