F = 0,2 кН = 200 Н
S = 10 м
cos a = 30° = √3/2
----------------------------------
A - ?
A = F × A = F × S × cos a = 200 Н × 10 м × √3/2 = 3000 Дж
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Дано:
F = 0,2 кН = 200 Н
S = 10 м
cos a = 30° = √3/2
----------------------------------
A - ?
Розв'язок:
A = F × A = F × S × cos a = 200 Н × 10 м × √3/2 = 3000 Дж