Pedro está realizando sus tareas de Física. Durante un descanso observa la goma de borrar y el lápiz sobre la mesa, y se pregunta por qué no se mueven el uno hacia el otro, si entre estos objetos existe atracción gravitatoria, como le han explicado en clase. a) ¿Realmente existe una fuerza de atracción gravitatoria entre el lápiz y la goma?

The gravitational force between these two objects is around

Explanation:

The gravitational force can be written as:

Here:

G is the gravitational constant m(1) is the first massm(2) is the second massr is the distance between two bodies.

If we see, the gravitational constant is a very small number, therefore the gravitational force is representative just when we have to massive bodies. Let's suppose that the mass of the pencil is 0.1 kg and the eraser is 0.1 kg too, the distance between them would be around 10 cm or 0.1 m, for instance.

Now let's calculate the gravitational force of these two bodies.

         

As we see it is very small force, so it is negligible relation to the earth gravitational force. That is why these two objects do not move towards each other.

I hope it helps you!

   

Is a  vector quantity  that refers to "the rate at which an object changes its position." imagine a person moving rapidly - one step forward and one step back - always returning to the original starting position. while this might result in a frenzy of activity, it would result in a zero velocity. because the person always returns to the original position, the motion would never result in a change in position. since velocity is defined as the rate at which the position changes, this motion results in zero velocity. if a person in motion wishes to maximize their velocity, then that person must make every effort to maximize the amount that they are displaced from their original position. every step must go into moving that person further from where he or she started. for certain, the person should never change directions and begin to return to the starting position.

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