Unit 7 Lesson 1

By what factor will force change if distance is 1/5th smaller?

force factor = 1/(1/5)^2 force factor = 25

By what factor will force change if distance is 5 times larger?

force factor = 1/(5)^2 force factor = 1/25

In order to triple the attractive electric force between two oppositely charged particles, one must - triple the charge of one particle - triple the separation distance - triple the charge of both particles - reduce the separation distance to 1/3 of the original distance

triple the charge of one particle

Two charged particles exert a 1 N electric force on each other. What would be the new electric force if the charge were: ~ Quartered ~ Halved ~ Doubled

~ 0.25 N ~ 0.5 N ~ 2 N

Two charged particles exert a 1 N electric force on each other. What would be the electric force if the separation distance were: ~ Quartered ~ Halved ~ Doubled

~ 16 N ~ 4 N ~ 0.25 N

Two charged particles exert a 1 N electric force on each other. List 3 ways to increase the force by 4 times to be 4 N of electric force.

~ Quadruple one of the charges ~ Double both of the charges ~ Halve the distance.

Two balloons with charges of -1.37x10^-6 C & -8.21x10^-6 C attract each other from a distance of 0.62 m. Determine the magnitude of the repulsive force between the two balloons.

0.26 N

Two positively-charged particles exert a repulsive force on each other. If the distance between the two particles is quadrupled, the force of attraction between the two charges would be - 1/16th of the original force - 16 times the original force - 4 times the original force - 1/4th of the original force

1/16th of the original force

Two charged boxes are 4.0 meters apart from each other. The blue box has a charge of +2.4x10^-4 C and the red box has a charge of +4.7x10^-4 C. Determine the magnitude of the repulsive force between the two boxes.

63 N

Determine the repulsive electric force between two electrons separated by 0.005 m. Assume that each electron has a charge -1.6 x 10^-19 C. - 9.2 x 10^-24 N - 4.6 x 10^-26 N - 5.8 x 10^-5 N - 1.0 x 10^-33 N

9.2 x 10^-24 N

The electric charge of an electron is -1.6x10^-19 C, and the electric charge of a proton is +1.6x10^-19. The average separation distance between a proton and electron of a hydrogen atom is 0.530x10^-10 m.

Fe=k((-1.6x10^-19*1.6x10^-19)/(0.530x10^-10)^2) Fe=k((2.56x10^-38)/(2.809x10^-21)) Fe=k(9.11356355x10^-18) Fe=8.2x10^-8 N

Coulomb's Law

Fe=k(|q1q2|/d^2) k= Coulomb's constant (8.99x10^9 Nm^2/C^2) q= charge in units of Coulombs d= separation distance