What is the answer to question below:

Question

A truck travelling due north at 20 ms^-1 turns west and travels at the same speed. The change in its velocity will be

Answer 1

Let the velocity vectors be v₁ = 20 m/s due North and v₂ = 20 m/s due East.

   Change in velocity = v₂  - v₁

|v_2­  - v₁| = √{v₁ ² + (-v₂)²} = √{20² + 20²} = 20√2 m/s

Now v_2­  - v₁ = 20√2 m/s due to south west