CALC? A force in the + x-direction with magnitude F(x) = 18.0 N – (0.530 N/m)x is applied to a 6.00-kg box that is sitting on the horizontal, frictionless surface of a frozen lake. F(x) is the only horizontal force on the box. If the box is initially at rest at x = 0, what is its speed after it has traveled 14.0 m?

Solution 47E Step 1: Work done on the body, W = FS cos Where, F - Force applied and S - Displacement for the body - Angle between force and displacement If both are in same direction, then = 0 Therefore, W = FS