DUM20132 (Unit 2)

Where is the word vector came from?

• Greek

• Latin

• Babylon

• Rome

What does vector means from Latin?

• Barrier

• Carrier

• Bridge

• Liaison

Below is the examples of row vector of 2-D except :-

• 
• [5 2]

Which is scalar quantities?

• Speed

• Displacement

• Momentum

• Force

Below are the examples of scalar quantities except :-

• Density

• Mass

• Volume

• Velocity

Which is the distributive laws of vector algebra?

• k(v + w) = kv + kw

• v + w = w + v

• u + (v + w) = (u + v) + w

• v + (-v) = 0

The 3-D vector of AB = (-1 2 -3) can be written as :-

• i - 2j + 3k

• -i + 2j + 3k

• -i + 2j -3k

• i + 2j - 3k

Given that the vector of m = 2i - 7j + 5k. Find its magnitude?

Obtain the unit vector of n = 3i + 8j.

• 0.351i + 0.936j

• 0.251i + 0.836j

• 
• 

Given that the vector r = -3i + 5j and s = 4i - 7j. Find the angle between r and s.