Multiplying a vector by a number and applying vectors
Answers are for parents and teachers.
1
|→a| = 7. What is |−4→a|?
28
2
|→a| = 4. What is |5→a|?
20
3
One side of a triangle is 46. How long is the midline parallel to it?
23
4
C is the midpoint of AB and |→OA + →OB| = 30. What is |→OC|?
15
5
Write the three stages of the vector method in your own words.
1) write the condition in vector form; 2) transform it with vector algebra; 3) interpret the result geometrically.