Question

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Which statement explains how planets move in orbit as supported by Newton’s first law of motion?

Planets can change the direction of their own orbital path.
Planets can change orbits due to their inertia.
Planets in motion will have a constant speed unless acted on by an outside force.
Planets with a greater mass will orbit more quickly than smaller planets.

Answer 1

Planets in motion will have a constant speed unless acted on by an outside force (c)

Answer 2

C

Step-by-step explanation:

that's just what I learned in school