Math Problem Statement

Jawablah

Sebuah vektor kecepatan membentuk sudut sebesar 45° dengan sumbu x positif dan besarnya 60 m/s. Tentukan komponen-komponen vektor tersebut!

Solution

The text in the image is asking about a velocity vector that forms a 45° angle with the positive x-axis, and its magnitude is 60 m/s. The task is to find the components of the vector.

To solve this, we can use trigonometry to find the components of the velocity vector. The vector can be represented in terms of its horizontal (x) and vertical (y) components using the following formulas:

  • vx=vcos(θ)v_x = v \cdot \cos(\theta)
  • vy=vsin(θ)v_y = v \cdot \sin(\theta)

Where:

  • vv is the magnitude of the vector (60 m/s),
  • θ\theta is the angle (45°),
  • vxv_x and vyv_y are the x and y components of the vector.

Now, plugging in the values:

  1. For vxv_x: vx=60cos(45)=6022600.70742.43m/sv_x = 60 \cdot \cos(45^\circ) = 60 \cdot \frac{\sqrt{2}}{2} \approx 60 \cdot 0.707 \approx 42.43 \, \text{m/s}

  2. For vyv_y: vy=60sin(45)=6022600.70742.43m/sv_y = 60 \cdot \sin(45^\circ) = 60 \cdot \frac{\sqrt{2}}{2} \approx 60 \cdot 0.707 \approx 42.43 \, \text{m/s}

Thus, the components of the velocity vector are approximately:

  • vx42.43m/sv_x \approx 42.43 \, \text{m/s}
  • vy42.43m/sv_y \approx 42.43 \, \text{m/s}

If you need further explanations or have more questions, feel free to ask!

Here are 5 related questions you might find helpful:

  1. How do I interpret vector components in physics?
  2. What is the significance of the angle between vectors?
  3. How can I find the magnitude of a vector given its components?
  4. What other methods can be used to decompose vectors into components?
  5. What would happen if the angle were 90° or 0°?

Tip: When working with vectors, always double-check the angle's orientation relative to the axes, as that will affect which trigonometric functions to use (sine for y-components, cosine for x-components).

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Math Problem Analysis

Mathematical Concepts

Vectors
Trigonometry
Component Resolution

Formulas

v_x = v * cos(θ)
v_y = v * sin(θ)

Theorems

Vector Decomposition

Suitable Grade Level

Grades 10-12