1. The problem statement, all variables and given/known data A 2.0-kg body moving along the x axis has a velocity vx = 5.0 m/s at x = 0. The only force acting on the object is given by Fx = (–4.0x) N, where x is in m. For what value of x will this object first come (momentarily) to rest? 2. Relevant equations 0.5 mv^2 = KE F*d = work 3. The attempt at a solution Since KE = 0.5 * 2 * 5^2 = 25J and F*d = -4.0x^2 -4x^2 = 25J x = 2.5 m This is how I approached it, but the answer is 3.5m. Can anyone help me out?