||'''Book'''|| Advanced Engineering Mathematics ||
 ||'''Author'''|| Erwin Kreyszig ||
 ||'''Edition'''|| 8th Edition ||

/* code_begins */
/* P0 is the vector representation of co-ordinates of object of mass 'M'
   P1 is the vector representation of co-ordinates of object of mass 'm'
   x0,y0,z0 are the co-ordinates similarly x1,y1,z1
   G=gravitational constant
   mag_r is the magnitude of displacement vactor r between abject 'M' and object 'm'
   force_mag is the magnitude of the gravitational force between them and its negative because it direction is towards P0
   force_dir is the unit vector along the direction of force
*/
{{{
var('x0');var('y0');var('z0');var('x1');var('y1');var('z1');var('M');var('m');
P0 = vector([x0,y0,z0]);
P1 = vector([x1,y1,z1]);
c = G*M*m;
mag_r = sqrt(((x1-x0)**2)+((y1-y0)**2)+((z1-z0)**2));
r = vector([x1-x0,y1-y0,z1-z0]);
force_mag = c/(mag_r)**2;
G = (6.67*(10**-8));
force_dir = -(r/mag_r);
}}}

/* code_ends */

 * '''Solution by''': 
   * Yogesh Agrawal, Student, IIIT-Hyderabad
   * <Your Name>, <Profession>, <Organization>