JebKush3161
10.11.2019 •
Mathematics
Acar is driven 225km west and then 98 km southwest (45∘). what is the displacement of the car from the point of origin (magnitude)?
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Ответ:
c - the displacement
Angle: 90° + 45° = 135°
c² = a² + b² - 2 ab cos 135°
c² = 98² + 225² - 2 · 98 · 225 · ( -0.7071 )
c² = 9,604 + 50,625 + 31,183.11
c² = 91,412.11
c = √ 91,412.11
c = 302.344 km
Ответ:
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