A 10 cm wide box is held between two springs in a 1 m gap on a frictionless surface. The left spring has a natural length of 80 cm and spring constant of 200 N/m. The right spring has a natural length of 90 cm and spring constant of 350 N/m. How far is the center of the box from the left edge in m

Respuesta :

Answer:

The distance is  [tex]x =0.291 \ m[/tex]

Explanation:

From the question we are told that

     The width of the box is [tex]b = 10 \ cm = \frac{10}{100} = 0.10 \ m[/tex]

     The gap is of length [tex]l = 1\ m[/tex]

    The natural length of the first spring is [tex]y = 80 \ cm = \frac{80 }{100} = 0.8 \ m[/tex]

     The spring constant of the first spring is  [tex]k_1 = 200 N/m[/tex]

     The second spring has a natural length of [tex]z = 90 \ cm = \frac{90}{100} = 0.9 \ m[/tex]

      The spring constant of the first spring is  [tex]k_2 = 350 \ N/m[/tex]

Let the distance from the center of the box to the left edge be x

      So at equilibrium

The force applied by the first spring is

      [tex]F_1 = k_1 * (0.8 -x)[/tex]

and

The force applied by the second spring is

        [tex]F_2 = k_2 * [ 0.9 - (0.9 -x)][/tex]

Now at equilibrium

       [tex]F_1 = F_2[/tex]

So

     [tex]k_1 * (0.8 -x) = k_2 * [ 0.9 - (0.9 -x)][/tex]

    substituting values

      [tex]200 * (0.8 -x) = 350 * [ 0.9 - (0.9 -x)][/tex]

        =>   [tex]160 -200x) = 350x[/tex]

        =>  [tex]160 =550x[/tex]

          =>   [tex]x =0.291 \ m[/tex]