Question

A plane traveling, north at 200 m/s turns and then travels south at 200 m/s. The change in its velocity is:​

Answer 1

Given:

• Velocity 1 = 200 m/s
• Velocity 2 = 200 m/s

To Find:

• The change in its velocity.

Solution:

let velocity 1 be the initial velocity (-200 m/s) and velocity 2 be the final velocity (200 m/s)

The change in velocity is given by,

ΔV = $V_2-V_1$  → {equation 1}

Where " $V_2$" is the second velocity, and " $V_1$" is the first velocity

On substituting the value in equation 1 we get,
⇒ ΔV = 200 - (-200) {multiplication of two negative signs is positive}

⇒ ΔV = 200+200 = 400 m/s in the south direction {adding the terms}

∴ The change in its velocity = 400 m/s in the south direction.

Answer 2

Answer:

Explanation:

If youre going north, (positive y direction) why would the velocity be -200? that makes no sense. since the final velocity is -200m/s south, -200 minus 200 = -400