QUIZIZ 1 VECTOR (MEI 2021 OCT 2021)

Which one of these is a vector?

• time

• mass

• velocity

• temperature

Vector quantity can be represented graphically by a line so that the length of the line denotes the ___________ of the quantity.

• direction

• magnitude

• direction and magnitude

• position

Represent the vector A if A is the point with coordinate (4,1)

• i+4j

• 4i-j

• 4i+j

• -4i+j

Given two vectors A and B. Which one of these represent the vector AB

•  $\overrightarrow{AO}\ +\overrightarrow{OB}$  

•  $-\overrightarrow{OA}\ -\overrightarrow{OB}$  

•  $\overrightarrow{AO\ }\ -\overrightarrow{OB}$  

Given two vectors V and W. Which one of these represent WV?

• $\overrightarrow{OV}\ +\overrightarrow{OW}$

• $\overrightarrow{OW}\ -\overrightarrow{OV}$

• $\overrightarrow{OV}\ -\overrightarrow{OW}$

• $-\overrightarrow{OV}\ -\overrightarrow{OW}$

Given point A(2,3,1) and B(-1,4,2), the vector AB is

• -3i+j+k

• 3i-j+k

• i+7j+3k

• 3i+7j+3k

Given vector a=i+j and b=8i-3j. Find b-a.

• 9i-2j

• -7i+4j

• 7i-4j

• 9i+2j

Given vector a=4i+j and b=2i-j. Find 2a+b.

• 10i+j

• 6i

• 6i+2j

• 8i+2j

Find the magnitude of 2i+3j

• $\sqrt{5}$

• $\sqrt{13}$

• $\sqrt{25}$

• $\sqrt{6}$

Given a=5i-j and b=3i+2j . Find a.b

• 17

• -17

• -13

• 13