Isolution available in Student Solutions denotes dendl QC denote S denote W deno

Question

Isolution available in Student Solutions denotes dendl QC denote S denote W denote dns full solut denotes full st often assigned in Enhanced WebAssign Study Guideabl 15.3 Cour 50-nC charge is located 1.8l m from a (a) Find the magnitude of the electro- Coulomb's Law 1. QC A cha thread Acar e. carrie 4.20-nC cha that one particle exerts on the other. (b) Is 1.00 orce attractive or repulsive? (a) If is 2.5 charged particle A exerts a force of 2.62 N to the ight on charged particle B when the particles are 13.7 mm apart. Particle B moves straight away from A of syste to make the distance between them 17.7 mm. What vec- 4. A si 7.50 tor force does particle B then exert on A? is a g Two metal balls A and B of negligible radius are floating at rest on Space Station Freedom between two metal bulkheads, connected by a taut nonconducting as 1 Uless otherwise noted, all content on this page is © Cengage Learning.

Explanation / Answer

1)

q1 = 7.5 nC

q2 = 4.20 nC

a) magnitude of force = k *q1 * q2/d^2

magnitude of force = 9 *10^9 * 7.5 *10^-9 * 4.2 *10^-9/1.80^2

magnitude of force = 8.75 *10^-8 N

b) as the charges are both positive , the force is Replusive

2)

initial distance , d1 = 13.7 mm

final distance , d2 = 17.7 mm

F1 = 2.62 N

as F = k * q1 * q2/d^2

for the same charges

F1/F2 = d2^2/d1^2

2.62/F2 = 17.7^2/13.7^2

solving for F2

F2 = 1.57 N

the new force vector is 1.57 N to the right

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