A 67 kg box is initially at rest when a student uses a rope to pull on it with 380 N of force for 3.0 m. There is negligible friction between the box and floor. What is the best estimate of the speed of the box after the displacement interval of 3.0m? Assume rightwards is the positive direction. Choose 1 answer: A. 6.4 m/s B. 5.8 m/s C. 7.8 m/s D. 4.9 m/s
