Math Problem Statement

What is the magnitude of vector w with coordinates (-11, -5)?

Solution

To find the magnitude of vector w\vec{w} with coordinates (11,5)(-11, -5), we can use the magnitude formula for a vector w=(a,b)\vec{w} = (a, b):

w=a2+b2|\vec{w}| = \sqrt{a^2 + b^2}

Given:

  • a=11a = -11
  • b=5b = -5

Substitute these values:

w=(11)2+(5)2|\vec{w}| = \sqrt{(-11)^2 + (-5)^2}

w=121+25|\vec{w}| = \sqrt{121 + 25}

w=146|\vec{w}| = \sqrt{146}

w12.08|\vec{w}| \approx 12.08

Thus, the magnitude of w\vec{w}, rounded to the nearest hundredth, is approximately 12.08.

Would you like further details or have any questions?


Here are five related questions for practice:

  1. What is the magnitude of a vector with coordinates (3,4)(3, 4)?
  2. If a vector has a magnitude of 1010, what are possible values for its components?
  3. How would the magnitude formula change in three dimensions?
  4. What is the direction (angle) of vector w\vec{w} with respect to the x-axis?
  5. How do negative signs in the components affect the magnitude of a vector?

Tip: Remember, the magnitude of a vector is always non-negative because it represents a distance in space.

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Math Problem Analysis

Mathematical Concepts

Vector Magnitude
Distance Formula
Coordinate Geometry

Formulas

|w| = sqrt(a^2 + b^2)

Theorems

Pythagorean Theorem

Suitable Grade Level

Grades 9-12