Math Problem Statement

The diagram below shows the top view of an object. Several forces are acting on the object as shown. Calculate the resultant forces in the x and y directions

Solution

To calculate the resultant forces in the xx and yy directions, we'll break down each force into its respective components.

Step 1: Identify the Forces and Angles

From the diagram:

  1. Force 1 (3 N) at 3030^\circ above the negative xx-axis.
  2. Force 2 (2 N) at 3030^\circ below the negative xx-axis.
  3. Force 3 (5 N) along the negative yy-axis.
  4. Force 4 (4 N) at 4545^\circ above the positive xx-axis.
  5. Force 5 (8 N) along the positive xx-axis.

Step 2: Resolve the Forces into Components

  1. Force 1 (3 N at 150150^\circ):

    • F1x=3cos(150)F_{1x} = 3 \cos(150^\circ)
    • F1y=3sin(150)F_{1y} = 3 \sin(150^\circ)
  2. Force 2 (2 N at 210210^\circ):

    • F2x=2cos(210)F_{2x} = 2 \cos(210^\circ)
    • F2y=2sin(210)F_{2y} = 2 \sin(210^\circ)
  3. Force 3 (5 N along negative yy-axis):

    • F3x=0F_{3x} = 0
    • F3y=5NF_{3y} = -5 \, \text{N}
  4. Force 4 (4 N at 4545^\circ):

    • F4x=4cos(45)F_{4x} = 4 \cos(45^\circ)
    • F4y=4sin(45)F_{4y} = 4 \sin(45^\circ)
  5. Force 5 (8 N along positive xx-axis):

    • F5x=8NF_{5x} = 8 \, \text{N}
    • F5y=0NF_{5y} = 0 \, \text{N}

Step 3: Calculate the Components

Now, let's calculate these components and sum them to find the resultant forces in the xx and yy directions.### Resultant Forces:

  1. Resultant Force in the xx-direction:

    • Fx6.50NF_x \approx 6.50 \, \text{N} (positive direction)
  2. Resultant Force in the yy-direction:

    • Fy1.67NF_y \approx -1.67 \, \text{N} (negative direction)

These components give us the net force acting on the object in the xx and yy directions.

Would you like more details or have any questions?

Related Questions:

  1. How would the net force change if one of the forces increased or decreased?
  2. What would be the effect on the net force if one of the forces was removed?
  3. How can the resultant vector be graphically represented on the coordinate plane?
  4. What is the magnitude and direction of the resultant vector?
  5. How would the forces be analyzed if they acted in three dimensions?

Tip: Always check the direction (sign) of your components to ensure they align with the physical setup of the problem.

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Math Problem Analysis

Mathematical Concepts

Vectors
Force Components
Resultant Forces

Formulas

Vector component decomposition
Trigonometric functions (cosine, sine)

Theorems

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Suitable Grade Level

High School