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Question
Which of the following statements is INCORRECT?
Options:
A .  Motion cannot be defined without a reference point.
B .  The Earth is moving with respect to a man in space.
C .  With respect to a man on Earth, the Sun is moving.
D .  The Moon is at rest with respect to a man on Earth.
Answer: Option D
:
D
To define motion, we need to define 'according to who?'. This means that the concept of motion is meaningless without the reference point.
With respect to a man in space, the Earth seems to be moving around the Sun. Hence, it is true.
With respect to a man on Earth, the Sun moves. That's seen in the form of sunrise and sunset. Hence, this statement is true.
With respect to a man on Earth, the Moon is moving. Hence, the statement "The Moon is at rest with respect to a man on Earth." is incorrect.

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