Work Kinetic Energy A force F= 10N pushes a box across a frictionless floor for a distance Ax= 5m. the speed of the box is v before the push, and v2 after the push F △X Physics 121: Lecture 12, Pg 11Physics 121: Lecture 12, Pg 11 Work & Kinetic Energy: A force F = 10N pushes a box across a frictionless floor for a distance x = 5m. The speed of the box is v1 before the push, and v2 after the push. x F v1 v2 i m