Solve the following question given below:
Question: On planet Tehar, the free-fall acceleration is the same as that on Earth, but there is also a strong downward electric field that is uniform close to the planet's surface. A 1.56-kg ball having a charge of 4.50 µC is thrown upward at a speed of 20.1 m/s. It hits the ground after an interval of 4.10 s.
Part A: What is the potential difference between the starting point and the top point of the trajectory?
__kV
I need help to solve the above question and use 9.8 m/s2 for the acceleration due to gravity.