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A block is pulled by two horizontal forces. The first force is 115 N at an angle of [tex]$75.0^{\circ}$[/tex] and the second is 213 N at an angle of [tex]$295^{\circ}$[/tex].

What is the [tex]$y$[/tex]-component of the total force acting on the block?

[tex]$\overrightarrow{F_y} = [?] \, \text{N}$[/tex]

Sagot :

To solve for the [tex]$y$[/tex]-component of the total force acting on the block, we will break down each force into its [tex]$y$[/tex]-component, sum these components, and find the total [tex]$y$[/tex]-component force. Let's proceed step by step:

1. Identify the Given Information:
- Force 1 ([tex]$F_1$[/tex]) has a magnitude of [tex]\(115\)[/tex] Newtons and an angle of [tex]\(75.0^\circ\)[/tex].
- Force 2 ([tex]$F_2$[/tex]) has a magnitude of [tex]\(213\)[/tex] Newtons and an angle of [tex]\(295.0^\circ\)[/tex].

2. Convert the Angles to Radians:
Since trigonometric calculations are often more convenient in radians, we will convert the angles from degrees to radians.
- Angle 1 in radians: [tex]\(75.0^\circ\)[/tex]
- Angle 2 in radians: [tex]\(295.0^\circ\)[/tex]

3. Calculate the [tex]$y$[/tex]-component of Each Force:
To find the [tex]$y$[/tex]-component of a force, use the sine component of the force at the given angle.

- For Force 1:
[tex]\[ F_{1y} = F_1 \sin(\theta_1) \][/tex]
Substituting the values, we get:
[tex]\[ F_{1y} = 115 \cdot \sin(75.0^\circ) \][/tex]
[tex]\[ F_{1y} \approx 111.08 \, \text{N} \][/tex]

- For Force 2:
[tex]\[ F_{2y} = F_2 \sin(\theta_2) \][/tex]
Substituting the values, we get:
[tex]\[ F_{2y} = 213 \cdot \sin(295.0^\circ) \][/tex]
[tex]\[ F_{2y} \approx -193.04 \, \text{N} \][/tex]

4. Sum the [tex]$y$[/tex]-components to Find the Total [tex]$y$[/tex]-component Force:
[tex]\[ F_y = F_{1y} + F_{2y} \][/tex]
Substitute the previously calculated values:
[tex]\[ F_y = 111.08 \, \text{N} + (-193.04 \, \text{N}) \][/tex]
[tex]\[ F_y \approx -81.96 \, \text{N} \][/tex]

So, the [tex]$y$[/tex]-component of the total force acting on the block is:
[tex]\[ \overrightarrow{F_y} \approx -81.96 \, \text{N} \][/tex]