Combining Vectors and Scalar multiplication

Which statement describes a vector?

• It has magnitude but no direction

• It has direction but no magnitude

• It has both direction and magnitude

• It has constant magnitude but no

  direction

Find the magnitude of vector AB if the initial point is (-3, 1) and the terminal point is (3, 9).

• 6

• 8.2

• 10

• 10.4

Find the magnitude of the vector <-5, 12>

• 13

• 10.91

• 7

• 17

Find the magnitude of the vector <10, -8>

• 2

• 12.81

• 6

• 18

Find the direction angle for the vector <2, 7>

• 74.05°

• 15.95°

• 195.94°

• 97.28°

Find the direction angle for the vector <-8, 3>

• 159.44°

• 200.56°

• 110.56°

• 249.44°

Find the magnitude of a vector using ...

• Sine & Cosine

• Inverse Tangent

• Pythagorean Theorem

• Multiplication

Which of the following is always positive?

• vector

• scalar

• direction

• magnitude

What is the first thing you do when solving a vector problem?

• Draw the vectors, making sure they are the right size and in the correct direction
• Look at the equation sheet!
• Draw the vectors, always pointing to the right
• Just do the math, it's always so easy

How should you add two vectors?

• Add them head to tail
• Add them tail to tail
• Add them with the addition key
• just add the length of each