Solve the following question:
Question: Physics A point charge q1=15.00uC is held fixed in space. From a horizontal distance of 3.00cm, a small sphere with mass 4.00 x 10-3 kg and charge q2=+2.00uC is fired toward the fixed charge with an initial speed of 38.0m/s. Gravity can be neglected.
Part A: What is the acceleration of the sphere at the instant when its speed is 26.0m/s?
I don't understand how to get the answer. Can you please help me with this question?