It shows that the gravitational force is directly proportional to the product of masses of two bodies and inversely proportional to the square of distance between them, So, as the mass of bodies increases, the gravitational force increases and with the increase of distance between them, the gravitational force decreases.
Plugging in for the Earth's mass and for G, we have 11.2 km/s for the escape velocity for an object launched from the Earth's surface. This is about 25,000 miles per hour
