Question

Let |r| = 17 at an angle of 40° and |s| = 14 at an angle of 160°. Which expression represents |r + s|?

ty :3

Answer 1

Answer:

B

Step-by-step explanation:

I got it right on edge2020, 160-40= 120

120/2 = 60 because the angle was gonna be half way between the two angles

Answer 2

The expression that represent | r+s| is Option B

What is a Vector ?

A vector is an object that has both magnitude and direction.

It is given that

|r| = 17 at an angle of 40 degree

|s| = 14 at an angle of 160 degree

| r + s| = ?

The magnitude will be determined by the cosine law

and the angle will be 60 degree , obtained from the figure attached with the answer.

$\rm |r + s| = \sqrt{ 17^2 + 14 ^2 -2 * 14 *17 cos 60$

Therefore , the expression that represent | r+s| is Option B.

To know more about Vector

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