The idea of a vector. Adding and subtracting vectors
Answers are for parents and teachers.
1
In a rectangle ABCD, AB = 9 and BC = 12. What is |→AB + →AD|? (→AB + →AD = →AC)
15
2
→a and →b point opposite ways, |→a| = 15 and |→b| = 8. What is |→a + →b|?
7
3
The side of a square ABCD is 7. What is the sum of the moduli of all four side vectors?
28
4
What is →AB + →BC + →CD + →DA equal to?
the zero vector
5
Explain the difference between a scalar quantity and a vector quantity with examples.
A scalar quantity is determined by a number alone (length, mass); a vector quantity also needs a direction (force, velocity).