Physics

Two identical +9.0 µC point charges are initially spaced 5.2 cm from each other. If they are released at the same instant from rest, how fast will they be moving when they are very far away from each other? Assume they have identical masses of 1.0 mg.

  1. 👍
  2. 👎
  3. 👁
  1. Potential energy of the charges is
    PE=k•q^2/r=9 •10^9•(9•10^-6)^2/0.052=14 Joules.
    According to the Law of conservation of energy
    PE=2KE
    KE=mv^2/2.
    2KE= mv^2 =PE
    v=sqroot(PE/m)=sqroot(14/10^-3)=118.3 m/s.

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. physic

    two point charges are placed on the x axis as follows: charge q1 = +4.00 nc is located at x = 0.200 m, and charge q2 = +5.00 nc is at x = -0.300 m what ae the magnitude and direction of the net force exerted by these two charges

  2. Physics

    The force between two identical charges separated by 1 cm is equal to 90 N. What is the magnitude of the two charges?

  3. Physics

    1) A point charge q2 = -0.5 μC is fixed at the origin of a co-ordinate system as shown. Another point charge q1 = 0.6 μC is initially located at point P, a distance d1 = 8.9 cm from the origin along the x-axis. a. What is ΔPE,

  4. Physics

    Two identical point charges are fixed to diagonally opposite corners of a square that is 1.5 m on a side. Each charge is +2.0 µC. How much work is done by the electric force as one of the charges moves to an empty corner? I have

  1. Science

    Two point charges are 10.0 cm apart and have charges of 2.0 μC and –2.0 μC, respectively. What is the magnitude of the electric field at the midpoint between the two charges? 8.99*10^9(2*10^-6/.025)=719200 Two equal charges

  2. physics

    Two point charges are 10.0 cm apart and have charges of 2.0 µC and -2.0 µC, respectively. What is the magnitude of the electric field at the midpoint between the two charges?

  3. physics

    Four identical charges (+2.0ìC each) are brought in from infinity and fixed to a straight line. The charges are located 0.40 meters apart. Determine the electric potential energy of this group.

  4. physics

    Four identical point charges (+2.51 nC) are placed at the corners of a rectangle, which measures 4.00 m by 7.00 m. If the electric potential is taken to be zero at infinity, what is the potential at the geometric center of this

  1. Physics

    Two point charges are separated by 10.0 cm and have charges of 2.0 μC and -2 μC, respectively. What is the electric field at the point midway between the two charges? (k = 8.99 x 109 N.m2/C2) A. 28.8 x 10 6 B. 14.4 x 106 C. 7.19

  2. Physics

    A billiard ball traveling at 3.00 m/s collides perfectly elastically with an identical billiard ball initially at rest on the level table. The initially moving billiard ball deflects 30.0° from its original direction. What is the

  3. Physics

    How do I solve this problem? The answers were given. Two point charges are separated by 25.0 cm. Find the net electric field these charges produce at: (a) point A (Ans: 8740 N/C, to the right) (b) point B (Ans: 6540 N/C, to the

  4. Physics

    Two point charges q1 and q2 are held 4.00 cm apart. An electron released at a point that is equidistant from both charges undergoes an initial acceleration of 8.95 X 10^18 m/s2 directly upward,parallel to the line connecting q1

You can view more similar questions or ask a new question.