Direction of Vector

Scalar multiplication is:

• multiplying two numbers from a scale

• when our classroom elf, Scalar, uses magic to create a twin

• multiplying a number against a vector to change its magnitude

• the solution when multiplying two vectors

Find the magnitude.

• 0

• 5

• -5

• 4

Find the magnitude.

• 5

• 3

• 25

• -4

Find the magnitude.

• -10

• -8

• 6

• 10

Find the magnitude and the direction of this vector.

• magnitude: 4

  direction: 36.87 degrees East of North

• magnitude: 5

  direction: 36.87 degrees North of East

• magnitude: 3

  direction: 53.13 degrees East of North

• magnitude: 5

  direction: 53.13 degrees North of East

Component Form

• <-3, -7>

• <3, -7>

• <-3, 7>

• <7, 3>

Write in component form and find the magnitude.

• <0, 4> magnitude 4
  

• <8, 2> magnitude 8

• <0, 4> magnitude 8.25

Find the resultant vector. What is the direction of the resultant vector?

• <5, 3> 30.96 degrees

• <1, 7> 81.86 degrees

• <7, 1> 8.13 degrees

• <3, 5> 59.04 degrees

Find the resultant vector.

• <9, 15>

• <7, 17>

• <15, 9>

• <11, 13>