A 7000kg truck of 125 km. h-1 is moving north and collide with a 7000g car which moves with 19.m. s-1 south. after collision the truck moves with 98km. h-1.calculate velocity of the car after collision ​

The answer is a.  i hope this

The answer is 4f======since electrostatic force is given by    we let f be the electrostatic force when  r = 1 m    if we let  denote the electrostatic force when the distance is decreased so that r = 0.5m, then    we established earlier that f = kq₁q₂. therefore    the force will now be 4f.

Answer4 million;