Vectors

How long is vector v if its coordinates are (3;4)?

• 7

• 2,65

• 5

• 8

How long is vector v if its coordinates are (5;10)?

• 3,87

• 11,18

• 8

• 12

Two vectors are given: a(1;0) and b(0;1). How large is their enclosed angle?

• 30^O

• 45^O

• 60^O

• 90^O

How large angle does the y=x line enclose with the positive side of the x-axis?

• 30^O

• 45^O

• 60^O

• 90^O

Two vectors are given: a(1;2) and b(3;6). What are the coordinates of vector a+b?

• (4;8)

• (3;8)

• (2;4)

• 25

Two vectors are given: a(-2;5) and b(0;3). What are the coordinates of vecor a-b?

• (-7;-3)

• (2;-2)

• (-2;2)

• (3;3)

A vector v is given: v(2;6). What are the coordinates of vector 3v?

• 2/3; 2)

• (6;18)

• (1;3)

• (8;20)

The initial point of a vector is A(2;7) and its endpoint is B(0;3). What are the coordinates of vector AB?

• (2;-4)

• (-2;4)

• (2;4)

• (-2; -4)

Two vectors are given: a(1;4) and b(2;3). How much is their scalar product?

• 14

• 10

• 11

• 12

Two vectors are given: a(0;3) and b(8;1). How much is their scalar product?

• 3

• 8

• 11

• 5