A 84 object is travelling due north at 15.4m/ when it begins to experience a constant net force of 1700 toward the south. How long will it take to stop under the influence of this force? Hint: Remember Newton's second law and your kinematic formulas. Also, be careful to note that the acceleration is, in fact, negative since the object is decelerating. Enter only a numerical answer. Do not include units in the answer box, else your response will be counted as incorrect.