Two 6.0 kg masses are separated by a distance of 4.0 m. what is the magnitude of the gravitational force between the two masses?

Explanation:

For this exercise we need to use the Gravitational Force Formula. This is:

Where is the gravitational force between two objects, is the gravitational constant () and is the distance between the objects.

We know that:

Therefore, in order to calculate the magnitude of the gravitational force between the two masses, we must substitute these values into the formula.

Then we get:

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when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.