Which statement correctly describes gravity?
A an attractive force that acts between all objects through contact
B an attractive force that acts between all objects without contact
C a repulsive force that acts between all objects through contact
D a repulsive force that acts between all objects without contact
The Correct Answer and Explanation is :
The correct statement is:
B. An attractive force that acts between all objects without contact.
Explanation:
Gravity is one of the four fundamental forces of nature, alongside electromagnetism, the strong nuclear force, and the weak nuclear force. It is a force that attracts objects toward each other, and it works over any distance, regardless of whether or not the objects are in physical contact. This force is present between all objects that have mass, no matter how small or large the objects are.
Gravity does not require direct contact between objects. Instead, it acts at a distance. For example, Earth pulls objects toward its center, but you don’t need to physically touch the ground to feel its pull. This is why the moon orbits Earth, and why objects fall when dropped. The Earth’s gravitational pull attracts objects to it, and this attraction increases with the mass of the objects and decreases with the square of the distance between them. This is described by Newton’s Law of Universal Gravitation, which states:
[
F = G \frac{m_1 m_2}{r^2}
]
Where:
- ( F ) is the gravitational force between two masses
- ( G ) is the gravitational constant
- ( m_1 ) and ( m_2 ) are the masses of the two objects
- ( r ) is the distance between the centers of the two objects
Gravity is always an attractive force. It pulls objects toward each other, as seen in the motion of planets around the sun or the falling of objects to the ground. This is fundamentally different from forces like electromagnetism, which can be both attractive and repulsive depending on the charges involved.
In conclusion, gravity is an attractive force acting at a distance between all objects with mass, not requiring contact, making option B the correct one.