Problem 3.21 A certain object is losing mass at a rate k (kg/s). It is acted upon by a constant force F. (a) 0, the mass is mo Determine its acceleration and its position as a function of time. Assume that at t = the velocity is zero and the object is at x = 0. (b) Show that as K → 0, the expression for x (t) reduces to x = 1/(t², that is, x = at². mo

Problem 3.21 A certain object is losing mass at a rate k (kg/s). It is acted upon by a constant force F. (a) 0, the mass is mo Determine its acceleration and its position as a function of time. Assume that at t = the velocity is zero and the object is at x = 0. (b) Show that as K → 0, the expression for x (t) reduces to x = 1/(t², that is, x = at². mo