With what force are two railway carriages, each weighing 70 tons, attracted if the distance between them is 200 m?

The force of gravitational attraction of cars to each other can be calculated by the formula:
F = G * m1 * m2 / R², where G is the gravitational constant (G = 6.67 * 10 ^ -11 m³ / (kg * s²)), m1 = m2 is the mass of the car (m1 = 70 t = 70 * 10³ kg), R is the distance between the cars (R = 200 m).
Let’s calculate the force of gravitational attraction:
F = G * m1 * m2 / R² = 6.67 * 10 ^ -11 * 70 * 10³ * 70 * 10³ / 200² = 0.00000817 N.
Answer: The cars are attracted to each other with a force of 0.00000817 N.