1. The problem statement, all variables and given/known data A 1.4-kg cart is attached to a horizontal spring for which the spring constant is 60 N/m . The system is set in motion when the cart is 0.27m from its equilibrium position, and the initial velocity is 2.6 m/s directed away from the equilibrium position. A. What is the amplitude of the oscillation? B. What is the speed of the cart at its equilibrium position? 2. Relevant equations E=K+U 3. The attempt at a solution U=½kΔx2 =½⋅60⋅0.272=2.187J K=½mv2=½⋅1.4⋅2.62=4.732J E=K+U=½mvf2 Is this the right way to proceed?