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7 класс. Работа и мощность: истина или ложь

Yes or No

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Проверь свои знания по работе и мощности.

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Kazakhstan

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7 класс. Работа и мощность: истина или ложь
 

7 класс. Работа и мощность: истина или ложьOnline version

Проверь свои знания по работе и мощности.

by Эльвира Габдрахимова
1

Единица мощности — Ватт

2

Векторная работа не зависит от направления перемещения.

3

Мощность равна работе, выполненной за единицу времени: P = W/Δt.

4

Мощность не зависит от скорости тела.

5

Работа зависит от угла между силой и перемещением: W = F·s·cosθ.

6

При отсутствии трения энергия не может преобразовываться в работу.

7

При постоянной силе работа равна F·s, где s — модуль перемещения по направлению силы.

8

Работа всегда положительная.

9

Джоуль — единица работы и энергии.

10

Работа измеряется Джоулях

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