Forces and kinematics

A $150 \,\text {kg}$150, start text, k, g, end text box is initially at rest when a student uses a rope to pull on it with $650 \,\text N$650, start text, N, end text of force for $2.0\, \text s$2, point, 0, start text, s, end text. There is negligible friction between the box and floor.