Question

A truck travelling due north at 20 m/sec turns west and travels at the same speed. What is the change in its velocity –

• A. 40 m/s north-west
• B. 20$\sqrt{2}$ m/s north-west
• C. 40 m/s south-west
• D. 20$\sqrt{2}$m/s south-west

Answer 1

Answer: (D)

20$\sqrt{2}$m/s south-west

Answer 2

Change in velocity = $\overset{\rightarrow}{V_{f}}$ – $\overset{\rightarrow}{V_{i}}$