A Charge of 50-μC Is Placed on the Y Axis

Multiple Choice

A charge of 50-μC is placed on the y axis at y = 3.0 cm and a 77-μC charge is placed on the x axis at x = 4.0 cm. If both charges are held fixed, what is the magnitude of the initial acceleration of an electron released from rest at the origin?

A) 1.2 × 1020 m/s²
B) 1.5 × 1020 m/s²
C) 1.0 × 1020 m/s²
D) 1.8 × 1020 m/s²
E) 2.0 × 1020 m/s²