Предмет: Физика, автор: Jdbwhhebehhs

помогите пожалуйста❗️❗️

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Автор ответа: xokyno

0

Відповідь: 44%

Дано:

F=40H

m=14kg

l=1.6 m

h=20 cm= 0.2 m

Знайти:
η - ?

Розв'язання:

η = Aк/Aп

Aк=mgh = 14*10*0.2 = 28

Aп=Fl = 40*1.6= 64

η = 28/65= 0.4375 = 43,75%≈44%

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