
PRODUCTO ESCALAR
Presentation
•
Mathematics
•
11th Grade
•
Easy
Rafael Ayabaca
Used 10+ times
FREE Resource
5 Slides • 3 Questions
1
PRODUCTO ESCALAR
Prof. Rafa
2
Producto escalar
El producto escalar o también llamado producto punto, se define de igual manera para los vectores libres en el plano así como en el espacio.
Llamamos producto escalar de dos vectores u y v de R3, u⋅v .
Si u=(u1, u2, u3) y v=(v1, v2, v3) , → u⋅v=(u1v1, u2v2, u3v3)
3
Multiple Choice
Al producto escalar de vectores se conoce también como:
producto raya
producto punto
producto cruz
4
Multiple Choice
Llamamos producto escalar de vectores al producto:
u⋅v
u×v
u→v
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Producto escalar
En particular, vemos que si los vectores son perpendiculares (u ortogonales), su producto escalar es 0, y viceversa, puesto que
cos(90)=0→ u⊥v↔u⋅v=0
Si u=v, entonces u⋅v=∣∣∣u∣∣∣∣∣∣v∣∣∣cos(0)=∣∣∣u∣∣∣2
∣∣∣u∣∣∣=u⋅u
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Expresión analítica del producto escalar.
Sean los vectores
u=(u1, u2, u3) y v=(v1, v2, v3)El producto escalar es: u⋅v=u1v1+u2v2+u3v3
El módulo del vector: ∣∣∣u∣∣∣=u12+u22+u32, ∣∣∣v∣∣∣=v12+v22+v32
Ángulo entre dos vectores en función de sus componentes: cos(u,v)=u12+u22+u32v12+v22+v32u1v1+u2v2+u3v3
7
Multiple Choice
El producto escalar entre dos vectores ortogonales es:
cero
uno
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PRODUCTO ESCALAR
Prof. Rafa
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