Vectors

Practice sheet

Fresh questions from the whole chapter, to do on paper.

To save a PDF, choose “Save as PDF” in the print dialog.

  1. The vector ⟨2,1⟩\langle 2, 1 \rangle starts at the point (1,1)(1, 1). Tap the point where it ends.
  2. P=(3,3)P = (3, 3) and Q=(8,8)Q = (8, 8). Which vector is PQ→\overrightarrow{PQ}?
    1. ⟨5,5⟩\langle 5, 5 \rangle
    2. ⟨−5,−5⟩\langle -5, -5 \rangle
    3. ⟨11,11⟩\langle 11, 11 \rangle
  3. Find the exact magnitude of v⃗=⟨6,−5⟩\vec{v} = \langle 6, -5 \rangle.
  4. Find the direction angle of ⟨2,3⟩\langle 2, 3 \rangle, in degrees, to 1 decimal place.
  5. Find the direction angle of ⟨−2,3⟩\langle -2, 3 \rangle, between 0∘0^\circ and 360∘360^\circ, to 1 decimal place.
  6. u⃗=⟨4,1⟩\vec{u} = \langle 4, 1 \rangle and v⃗=⟨5,6⟩\vec{v} = \langle 5, 6 \rangle. Find the exact value of ∣u⃗+v⃗∣|\vec{u} + \vec{v}|.
  7. u⃗=⟨2,3⟩\vec{u} = \langle 2, 3 \rangle and v⃗=⟨−3,1⟩\vec{v} = \langle -3, 1 \rangle, both starting at the origin. Tap the end point of u⃗+v⃗\vec{u} + \vec{v}.
  8. Find the horizontal component of the unit vector in the direction of ⟨3,4⟩\langle 3, 4 \rangle.
  9. A ball is kicked at 51 meters per second, at 35∘35^\circ above the ground. Find the horizontal component of its velocity, in meters per second, to 1 decimal place.Not to scale
  10. Find ⟨5,2⟩⋅⟨8,−9⟩\langle 5, 2 \rangle \cdot \langle 8, -9 \rangle.
  11. Are ⟨6,4⟩\langle 6, 4 \rangle and ⟨−8,12⟩\langle -8, 12 \rangle perpendicular?
    1. Yes: their dot product is 0
    2. No: neither of them is the zero vector
    3. No: their components do not add up to 0
  12. Find the angle between ⟨4,4⟩\langle 4, 4 \rangle and ⟨4,−3⟩\langle 4, -3 \rangle, in degrees, to 1 decimal place.