Answer: -10N
Explanation:
Given that,
negative charge (q1) = -2 C
positive charge (q2) = 4 C
Distance between charges (r) = 84,681 m
force between the two charges (F) = ?
Apply the formula for
F= (kq1q2) / r^2
Recall that k is Coulomb's constant with a value of 9 × 10^9 Nm2C−2
Then,
F = (9 × 10^9 Nm2C−2 x -2C x 4C) / (84,681 m)^2
F = (-7.2 x 10^10) / (84,681 m)^2
F = -9.998N (Rounded up to nearest whole number as -10N)
Thus, the force between the two charges is -10 newton
