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Force 20N, 30N, 40N, 50N,60N are acting along the sidese of a regular hexagon as shown in figure find the magnitude and deretion of the resultant force

Alisa patra , 4 Years ago
Grade 12th pass
anser 1 Answers
Askiitians Tutor Team

To find the resultant force acting on a regular hexagon with forces of 20N, 30N, 40N, 50N, and 60N applied along its sides, we need to consider both the magnitude and direction of these forces. A regular hexagon has symmetrical properties, which can simplify our calculations. Let's break this down step by step.

Understanding the Forces

In a regular hexagon, the angles between adjacent sides are all 120 degrees. This means that when forces are applied along the sides, we can use vector addition to find the resultant force. Each force can be represented as a vector with both magnitude and direction.

Breaking Down the Forces

Let's assign the forces to the sides of the hexagon. For simplicity, we can label the vertices of the hexagon from A to F, going clockwise:

  • Force at A (20N)
  • Force at B (30N)
  • Force at C (40N)
  • Force at D (50N)
  • Force at E (60N)

For the sake of calculation, we can assume that:

  • Force at A is directed to the right (0 degrees).
  • Force at B is directed at 120 degrees.
  • Force at C is directed at 240 degrees.
  • Force at D is directed at 0 degrees (same as A).
  • Force at E is directed at 120 degrees (same as B).

Calculating the Components

Next, we need to resolve each force into its horizontal (x) and vertical (y) components using trigonometric functions:

  • For 20N at 0 degrees:
    • Fx = 20N
    • Fy = 0N
  • For 30N at 120 degrees:
    • Fx = 30N * cos(120°) = -15N
    • Fy = 30N * sin(120°) = 25.98N
  • For 40N at 240 degrees:
    • Fx = 40N * cos(240°) = -20N
    • Fy = 40N * sin(240°) = -34.64N
  • For 50N at 0 degrees (same as A):
    • Fx = 50N
    • Fy = 0N
  • For 60N at 120 degrees (same as B):
    • Fx = 60N * cos(120°) = -30N
    • Fy = 60N * sin(120°) = 51.96N

Summing the Components

Now, let's sum up all the x and y components:

  • Total Fx = 20N - 15N - 20N + 50N - 30N = 5N
  • Total Fy = 0N + 25.98N - 34.64N + 0N + 51.96N = 43.30N

Finding the Resultant Force

The magnitude of the resultant force can be calculated using the Pythagorean theorem:

Resultant Force (R) = √(Fx² + Fy²)

Substituting the values:

R = √(5² + 43.30²) = √(25 + 1875.69) = √1900.69 ≈ 43.64N

Determining the Direction

The direction (angle θ) of the resultant force can be found using the tangent function:

θ = tan⁻¹(Fy/Fx)

Substituting the values:

θ = tan⁻¹(43.30/5) ≈ 83.66 degrees

Final Result

In summary, the magnitude of the resultant force acting on the hexagon is approximately 43.64N, and it is directed at an angle of approximately 83.66 degrees from the positive x-axis. This analysis illustrates how vector addition can be applied to find the resultant of multiple forces acting on an object.

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