Physics

Two spheres are attached to two identical springs and
separated by 8.0 cm, as in Figure 14. When a charge of
2.5 106 C is placed on each sphere, the distance
between the spheres doubles. Calculate the force constant
k of the springs.

  1. 👍 0
  2. 👎 0
  3. 👁 69
asked by Harsh
  1. from the center each sphere moves 8 - 4 = 4 cm = .04 m
    that is how far each spring is compressed.
    F = k x = 0.04 k
    now what is the electrostatic force when the spheres are 16 cm = 0.16 meters apart?
    F = [ 9*10^9 ] Q1Q2/(0.16)^2
    so
    0.04 k = [ 9*10^9] [ 2.5*10^6] [2.5*10^6] / [ 1.6^2*10^-2 ]
    Those charges are huge. Typo?

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. PHY

    . Four identical metal spheres have charges of qA = –8.0 µC, qB =–2.0 µC, qC = +5.0µ C, and qD = +12.0µ C. (a) Two of the spheres are brought together so they touch, and then they are separated. Which spheres are they, if

    asked by Saif on February 17, 2013
  2. Physics - charge on sphere

    Two 2.0g spheres are attached to each end of a silk thread 1.20m long. The spheres are given identical charges and the midpoint of the thread is then suspended from a point on the ceiling. The spheres come to rest in equilibrium,

    asked by Anonymous on October 18, 2010
  3. Physics

    Consider three identical metal spheres, A, B, and C. Sphere A carries a charge of -8q. Sphere B carries a charge of +7q. Sphere C carries no net charge. Spheres A and B are touched together and then separated. Sphere C is then

    asked by Mary on August 28, 2007
  4. physics

    Two spheres are mounted on identical horizontal springs and rest on a frictionless table, as in the drawing. When the spheres are uncharged, the spacing between them is 0.05 m, and the springs are unstrained. When each sphere has

    asked by Anonymous on February 25, 2014
  5. physics

    Two identical small spheres of mass 2.0g are fastened to the ends of an insulating thread of length 0.60m The spheres are suspended by a hook in the ceiling from the centre of the thread. The spheres are given identical electric

    asked by Diana on February 9, 2011
  6. physics

    The shock absorbers in the suspension system of a car are in such bad shape that they have no effect on the behavior of the springs attached to the axles. Each of the identical springs attached to the front axle supports 351 kg. A

    asked by Natasha on April 18, 2012
  7. physics

    The shock absorbers in the suspension system of a car are in such bad shape that they have no effect on the behavior of the springs attached to the axles. Each of the identical springs attached to the front axle supports 294 kg. A

    asked by Catherine on October 17, 2012
  8. physics

    The shock absorbers in the suspension system of a car are in such bad shape that they have no effect on the behavior of the springs attached to the axles. Each of the identical springs attached to the front axle supports 303 kg. A

    asked by Donna on November 26, 2013
  9. physics

    The shock absorbers in the suspension system of a car are in such bad shape that they have no effect on the behavior of the springs attached to the axles. Each of the identical springs attached to the front axle supports 351 kg. A

    asked by Natasha on April 18, 2012
  10. physics

    The circuit in the figure below consists of two identical, parallel metal plates connected to identical metal springs, a switch, and a 130-V battery. With the switch open, the plates are uncharged, are separated by a distance d =

    asked by Anonymous on June 11, 2012

More Similar Questions