1. The problem statement, all variables and given/known data A block of mass m rests on a horizontal surface. At t=0, a constant vertical force of magnitude F is applied to an ideal string attached to the block as shown. As a result, the block begins to move upward. Answer all parts in terms of F, m, g, and t. What is the velocity of the block as a function of time? Take upwards as positive. 2. Relevant equations Power and Energy: E = K + U; Ef = Ei Ef = Ei + W 3. The attempt at a solution I can't get an answer through the equations involved, my attempts include only the kinematics equations, but they aren't working.