Vector

Vector is a quantity with:

• magnitude and direction

• magnitude

• direction

• none of the above

Vectors are equivalent if they have the same magnitude and direction. Which are equivalent vectors?

• u and -u

• u and a

• u and v

• u and b

• a - b

• b - a

• -a - b

• 2a

Find the vector of AB with initial point A(0, 8) and terminal point B(-9, -3)

• -9i + 5j

• -9i - 11j

• -9i+11j

• -9i-5j

If y = 2i and z = -i - 4j, find 3y - 2z.

• 5i - 8j

• 4i + 8j

• 8i + 8j

• -8i - 8j

Find the magnitude of AB if the vector A = 5i + 3j and B = 3i + 9j.

• 40

• 5.66

• 6.32

• 32

Find the magnitude of the vector -5i + 12j

• 13
• 10.91
• 7
• 17

Find the dot product of <1, -2> and <3, 2>.

• 1
• <3, -4>
• <4, 0>
• -1

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

• 40.24°
• 49.76°
• 139.76°
• 92.57°

u*v

• -82

• -58

• 82

• 58