Gravitational Force Definition and Explanation
The question describes a fundamental concept in physics: the force of attraction between objects based on their mass and separation distance. This description perfectly matches Newton's Law of Universal Gravitation.
Newton's Law of Universal Gravitation
This law states that any two bodies in the universe attract each other with a force. This gravitational force has two main characteristics as described in the question:
- It is directly proportional to the product of the masses of the two bodies. This means if you increase the mass of either object, the force gets stronger.
- It is inversely proportional to the square of the distance of separation between their centers. This means if you double the distance, the force becomes four times weaker (\(1/2^2 = 1/4\)).
Mathematical Representation
We can express this law mathematically using the following formula:
\( F = G \frac{m_1 m_2}{r^2} \)
Where:
- \(F\) represents the magnitude of the gravitational force between the two bodies.
- \(G\) is the universal gravitational constant (approximately \(6.674 \times 10^{-11} \, \text{N}\cdot\text{m}^2/\text{kg}^2\)).
- \(m_1\) and \(m_2\) are the masses of the two bodies.
- \(r\) is the distance between the centers of the two bodies.
Analysis of Options
- Gravitational force: This option accurately reflects the definition provided in the question. The force depends on mass and distance squared.
- Electromagnetic force: This force acts between electrically charged particles. It can be attractive or repulsive and depends on the magnitude of the charges and the distance. It's not primarily dependent on mass in the way described.
- Electrostatic force: This is a specific type of electromagnetic force acting between stationary electric charges. Like the electromagnetic force, it depends on charge, not mass.
- Electromotive force (EMF): This is not a force in the classical sense but rather the potential difference (voltage) produced by an energy source, like a battery. It drives electric current.
Therefore, the force described in the question is the gravitational force.
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Important Questions from Physics
On the basis of which principle does soap clean surfaces?
Which one of the following devices is used to measure atmospheric pressure?
Which one of the following energy is stored in the links between the atoms?
Who among the following has explained the phenomenon of photoelectric effect?
What special name is given to the frictional force exerted by a fluid?
