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Must Waste More Time...
1. 1 Дж.
2. 1,5*
Дж.
Объяснение:
№1.
Механическая работа силы определяется по формуле A = F*S*cos α (α — угол между направлениями силы F и перемещения S). Так как действует только одна сила, F, α=0°, соs α = 1, а значит, A = F*S.
[! Если ещё не проходили формулу с косинусом (что может быть, я не знаю, за какой класс задача), то вместо A = F*S*cos α нужно сразу написать А = F*S!]
Подставим в эту формулу значения из условия:
А = 2 Н * 0,5 м = 1 Дж.
ответ: 1 Дж.
№2.
Механическую работу можно вычислить по формуле A = N*t (N — механическая мощность, t — время). Подставим в эту формулу значения из условия:
А = 1,5 *
Вт * 1 с = 1,5 *
Дж.
ответ: 1,5*
Дж.