# Physics,Science

Two point charges Q1 = 10µc and Q2 = -2µc are arranged along the x-axis at x
= 0 and x =4m respectively. Find the positions along the x-axis where v = 0

1. 👍 0
2. 👎 0
3. 👁 101
1. Potential is kQ/r
testing three cases: to the left of Q1, to the right of Q2, and inbetween.
: to the left (x<0)
V=k*10/x-k2/(4+x)
or 2x=10(4+x)
x=-40/8=-5m
: in between
V=k10/x-2k/(4-x) or
0=40-x-2x or x=40/3 which is not in between the points.
: to the right
V=10k/(x)-2k/((x-4) or
10x-40=2x
8x=40 or x=5m

1. 👍 0
2. 👎 0
2. check my work.

1. 👍 0
2. 👎 0

## Similar Questions

1. ### physics

Two point charges of +30μC and -10μC are separated by a distance of 10cm. What is the magnitude of electric field due to these charges at a point midway between them? (k = 9 × 109 N · m2/C2)

asked by mike on September 10, 2015
2. ### physics

Two point charges lie on the x axis. A charge of 6.2μC is at the origin, and a charge of -9.5μC is at x=10.0cm. What is the net electric field at (a) x=−4.0cm and at (b) x=+4.0cm?

asked by afton on January 30, 2014
3. ### physics

three point charges are placed at the following points on the x-axis: +2µC at x=0, -3µC at x=40 cm, -5µC at x=120 cm. Find the force (a) on the -3µC charge (b)on the -5µC charge.

asked by Joanna Luz on January 24, 2011
4. ### Physics

A point charge Q1=-2µC is located at x=0, and a point charge Q2=-8µC is placed at on the x -axis of a cartesian coordinate system.The goal of this problem is to determine the electric field,E(x)=E(x)x^ , at various points along

asked by Anonymous on February 25, 2013
5. ### Physics

Three point charges are arranged along the x axis: q1 = −4.43 nC at x1 = 199 mm, q2 = 2.33 nC at x2 = -302 mm, and a positive charge q3 at the origin. What is the value of q3 if the net force on this point charge has magnitude

asked by Julia on February 16, 2008
6. ### Physics

A point charge Q1=-2µC is located at x=0, and a point charge Q2=-8µC is placed at on the x -axis of a cartesian coordinate system.The goal of this problem is to determine the electric field,E(x)=E(x)x^ , at various points along

asked by Anonymous on February 27, 2013
7. ### physics

Two point charges q1 = q2 = 2μC are fixed at x1 = + 3 and x2 = – 3. A third particle of mass 1 g and charge q3 = – 4 μC are released from rest at y = 4.0. Find the speed of the particle as it reaches the origin. q1= q q2= -q

asked by sophie moagi on August 12, 2015
8. ### physics

Three point charges are arranged along the x-axis. Charge q1 = +2.75 µC is at the origin, and charge q2 = -5.25 µC is at x = 0.220 m. Charge q3 = -6.50 µC. Where is q3 located if the net force on q1 is 7.50 N in the

asked by figo on January 27, 2013
9. ### physics

Three point charges are arranged along the x-axis. Charge q 1 = +3.00 ìC is at the origin, and charge q 2 = -5.00 ìC is at x = 0.200 m . Charge q 3 = +8.00 ìC . Where is q 3 located if the net force on q 1 is 7.00 N in the −x

asked by Anonymous on February 4, 2015
10. ### Phyiscs

Three point charges are arranged along the x-axis. Charge q1 = +2.75 µC is at the origin, and charge q2 = -6.00 µC is at x = 0.220 m. Charge q3 = -7.00 µC. Where is q3 located if the net force on q1 is 6.75 N in the

asked by Anonymous on February 1, 2018

More Similar Questions