A cube with a mass of 30kg is lifted by a constant force to a height of 10m in 5s. If the initial velocity of the body is zero and the acceleration of gravity is g =9.8m / s2, what is the value of the mechanical work done by this force?

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.