Question

a truck travelling due to north at 20m/s turns East and travels at the same speed.find the change in its velocity

Answer 1

Answer on Question#38821, Physics, Mechanics

Question:

A truck travelling due to north at $20\mathrm{m / s}$ turns East and travels at the same speed. Find the change in its velocity

Answer:

where $\vec{v}$ is velocity directed to north, $\vec{v'}$ is velocity directed to East, $\vec{\Delta v}$ is change in velocity.

Pythagorean theorem:

$$\Delta v = \sqrt {| \vec {v} | ^ {2} + \left| \overrightarrow {v ^ {\prime}} \right| ^ {2}} = 2 0 \sqrt {2} \frac {m}{s} \cong 2 8 \frac {m}{s}$$

Answer: $28\frac{m}{s}$