Gravity and Motion

Gravity acts as a centripetal force, pulling objects inward toward the center of the larger body, which keeps them in a curved orbital path.

An orbiting satellite is in constant free fall; gravity pulls it toward Earth, while its forward velocity (inertia) keeps it from crashing, resulting in a stable orbit.

Free fall occurs when gravity is the only force acting on an object, causing it to accelerate downward at the rate of gravity.

According to Newton's law of universal gravitation, the gravitational force between two objects is inversely proportional to the square of the distance between them; thus, decreasing the distance increases the force.

Gravitational force is directly proportional to the product of the masses of the two objects; therefore, increasing the mass increases the gravitational force.

The strength of the gravitational force between two objects is determined by their masses and the distance separating their centers.

The Law of Universal Gravitation states that every particle of matter in the universe attracts every other particle with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.

Gravity pulls matter toward the center of mass. For an object to become spherical, it must have enough mass to generate sufficient gravitational force to overcome the structural strength of its material.

Gravity is a fundamental force of attraction that exists between all objects with mass. The strength of this force depends on the mass of the objects and the distance between them.

Air resistance is a fluid friction force that acts against the motion of an object moving through the air. Gravity and magnetism are not opposing forces in this context, and friction usually refers to surface contact.

In a vacuum, all objects accelerate at the same rate due to gravity regardless of their mass. This is a fundamental principle of physics demonstrated by Galileo.

In the absence of air resistance, gravity acts on all objects with the same acceleration. Therefore, a brick and a feather would fall at the same rate.

The standard acceleration due to gravity on Earth is approximately 9.8 m/s^2. The other options are incorrect values.

Gravity is strictly an attractive force; it pulls objects toward each other. It cannot push objects away.

Gravity is defined as the force of attraction between two objects that have mass. Inertia is an object's resistance to change in motion, and magnetism is a different force entirely.