A Particle (Q = +5

Multiple Choice

A particle (q = +5.0 μC) is released from rest when it is 2.0 m from a charged particle which is held at rest. After the positively charged particle has moved 1.0 m toward the fixed particle, it has a kinetic energy of 50 mJ. What is the charge on the fixed particle?

A) −2.2 μC
B) +6.7 μC
C) −2.7 μC
D) +8.0 μC
E) −1.1 μC