1. The problem statement, all variables and given/known data Two boxes each of mass 12kg are raised 1.8m to a shelf. The first one is lifted and the second is pushed up a smooth ramp. If the applied force on the second box is 48N, calculate the angle between the ramp and the ground. 2. Relevant equations W = Eg = mgh for first (lifted) box Trig to calculate angle 3. The attempt at a solution I first calculated the gravitational energy on the first box that is lifted: Eg = (12kg)(9.8m/s^2)(1.8m) = 211.7N Then, knowing that, used trig to calculate the angle between ramp and ground: Sin (theta) = opposite (211.7N)/hypoteneuse(48N) and, naturally, this does not compute, so where did I go wrong?