Math Problem Statement

Skip A block is pulled by two horizontal forces. The first force is 207 newtons at an angle of 60.5 degrees and the second is 175 newtons at an angle of 282 degrees. What is the x-component of the total force acting on the block? F sub x equals blank newtons. Fill in the blank. x-component (N)

Solution

To determine the xx-component of the total force acting on the block, we need to calculate the xx-components of the two forces separately and then sum them.

Given:

  1. Force 1: F1=207NF_1 = 207 \, \mathrm{N}, angle θ1=60.5\theta_1 = 60.5^\circ
  2. Force 2: F2=175NF_2 = 175 \, \mathrm{N}, angle θ2=282\theta_2 = 282^\circ

The xx-component of a force is calculated as: Fx=Fcos(θ)F_x = F \cos(\theta)

Step 1: Calculate the xx-components of each force

Force 1:

F1x=207cos(60.5)F_{1x} = 207 \cos(60.5^\circ) Using cos(60.5)0.4961\cos(60.5^\circ) \approx 0.4961: F1x=207×0.4961=102.7NF_{1x} = 207 \times 0.4961 = 102.7 \, \mathrm{N}

Force 2:

F2x=175cos(282)F_{2x} = 175 \cos(282^\circ) Since cos(282)=cos(282360)=cos(78)0.2079\cos(282^\circ) = \cos(282^\circ - 360^\circ) = \cos(-78^\circ) \approx 0.2079: F2x=175×0.2079=36.4NF_{2x} = 175 \times 0.2079 = 36.4 \, \mathrm{N}

Step 2: Add the xx-components

Because the angle 282282^\circ points slightly to the left of the yy-axis, its xx-component is negative. Thus: Ftotal,x=F1x+F2x=102.736.4=66.3NF_{\text{total},x} = F_{1x} + F_{2x} = 102.7 - 36.4 = 66.3 \, \mathrm{N}

Final Answer:

The xx-component of the total force is: 66.3N\boxed{66.3 \, \mathrm{N}}

Let me know if you want further clarification!

Relative Questions:

  1. How do angles greater than 180180^\circ affect xx- and yy-components of a force?
  2. What is the yy-component of the total force in this problem?
  3. How would the problem change if the block were on an inclined plane?
  4. How can vector components be visualized graphically?
  5. Why is it useful to resolve forces into components?

Tip:

Always double-check the quadrant of your angle to correctly assign positive or negative signs to components!

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Math Problem Analysis

Mathematical Concepts

Vector Addition
Force Components
Trigonometry

Formulas

F_x = F * cos(θ)

Theorems

Resolution of Forces
Law of Cosines (for vector components)

Suitable Grade Level

Grades 9-12