2 - Vectors Flashcards
1
Q
How do you calculate a unit vector?
A
2
Q
What is the equation for a velocity vector?
A
3
Q
How do you calculate the area of a triangle with two sides defined by vectors a and b
A
1/2| a x b |
4
Q
When asked at what time/ distance a stationary point is CLOSEST to a vector. What equation would you use?
A
the SCALAR product equation.
The time/distance when a vector is closest to a stationary point is when the line is PERPENDICULAR. And thus 90 degrees.
The scalar product uses cos(x), and when perpendicular cos(90) which equals 0.
Therefore the cross product of the two lines must be 0.
5
Q
What is the equation of a line through points with position vectors a and b?
A
