Question

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in our solar system, planets and other objects orbit the sun. while natural satellites like the moon orbit earth.
which set of forces are responsible for celestial objects orbiting other celestial objects.
∘ gravity and inertia
∘ push and pull
∘ gravity and magnetism
∘ mass and distance

Explanation:

To determine the forces responsible for celestial objects orbiting others, we analyze each option:

• Gravity and inertia: Gravity pulls celestial objects toward each other (e.g., the Sun’s gravity pulls planets, Earth’s gravity pulls the Moon). Inertia is the tendency of an object to keep moving in a straight line at a constant velocity. The balance between the inward pull of gravity and the forward motion due to inertia causes orbits (e.g., a planet’s inertia makes it want to move straight, but gravity curves its path into an orbit).
• Push and pull: These are vague terms and not the specific scientific forces explaining orbits.
• Gravity and magnetism: Magnetism is not a significant force for celestial orbits (e.g., planets and stars do not orbit each other due to magnetism).
• Mass and distance: These are factors that affect the strength of gravity (via Newton’s law of gravitation \( F = G\frac{m_1m_2}{r^2} \)), but they are not forces themselves.

So, gravity (pulling objects together) and inertia (maintaining the object’s forward motion) work together to create orbits.

Answer:

A. gravity and inertia