Earth-Moon-Sun System Answers

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The image shows Earth’s orbit around the Sun.

Question illustration
A
The speed increases from W to X because a component of the gravitational force acts in the direction opposite to the velocity.
B
The speed increases from W to X because a component of the gravitational force acts in the direction of the velocity.
C
The speed increases from X to W because a component of the gravitational force acts in the direction opposite to the velocity.
D
The speed increases from X to W because a component of the gravitational force acts in the direction of the velocity.
3

The image shows how Earth orbits the Sun. Points W and X are the same distance from the Sun.

Question illustration
A
Earth is speeding up at W and slowing down at X because the force on Earth is greater at W than at X.
B
Earth is slowing down at W and speeding up at X because the force on Earth is greater at W than at X.
C
The speed of Earth is the same at W as at X because the force on Earth is the same at W as at X.
D
The speed of Earth is greater at W than at X because the force on Earth is greater at W than at X.

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