Dot Product(FEb22)

If the dot product of two vectors is equal to zero, then what do we know about the two vectors? Select all that are correct.

• They are parallel.

• They are orthogonal.

• They are neither.

• who knows?????????

• They are perpendicular

What is the answer when you take dot product between two vectors?

• a vector

• a scalar

• a vector and scalar

• nothing

Find the magnitude of the resulting force of the combined vectors given their magnitude and direction:
F₁ : magnitude = 60 lbs, θ = 80°
F₂ : magnitude = 80 lbs, θ = 20°

• 121.66 lbs
• <85.6, 86.5>
• 45.3°
• 140 lbs

Find the component form of the resulting force of the combined vectors given magnitude and direction:
F₁ : magnitude = 60 lbs, θ = 80°
F₂ : magnitude = 80 lbs, θ = 20°

• 121.66 lbs
• <85.6, 86.5>
• 45.3°
• 140 lbs

Tags

CCSS.HSN.VM.A.2

Find the angle between v and w

• 21.8 degrees

• 111.8 degrees

• 68.2 degrees

Find the angle between vectors <1,3> and <2,-5>.

• 40.24°
• 49.76°
• 139.76°
• 92.57°

What is the length of u = [2,-1,2]?

• 3

• 9

Tags

CCSS.HSN.VM.A.1

How do you know if two vectors are orthogonal?

• Their sum is 0.
• The dot product is 1.
• The angle between them is 0°.
• The dot product is 0.

• -24

• 24

• 48

• -48

• 41

• 12

• 21

• 14