A 20-Kg Body Moving Along the X Axis Has a Velocity

Multiple Choice

A 2.0-kg body moving along the x axis has a velocity vx = 5.0 m/s at x = 0. The only force acting on the object is given by Fx = (-4.0x) N, where x is in m. For what value of x will this object first come (momentarily) to rest?

A) 4.2 m
B) 3.5 m
C) 5.3 m
D) 6.4 m
E) 5.0 m