A rocket, initially at rest on the ground, accelerates straight upward from rest with constant (net) acceleration 39.2 m/s2 . The acceleration period lasts for time 10.0 s until the fuel is exhausted. After that, the rocket is in free fall. Find the maximum height y-max reached by the rocket. Ignore air resistance and assume a constant acceleration due to gravity equal to 9.80 m/s^2.

Point charges q1=+2.00μc and q2=−2.00μc are placed at adjacent corners of a square for which the length of each side is 1.50 cm . point a is at the center of the square, and point b is at the empty corner closest to q2. take the electric potential to be zero at a distance far from both charges. part a what is the electric potential at point a due to q1 and q2? express your answer with the appropriate units.