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Escape Velocity

Which law is ...

Question

Which law is in control of a spacecraft that cruises through space at a constant speed without using any fuel?

A

Newton’s second law

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B

Universal law of gravitation

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C

Newton’s third law

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D

Newton’s first law

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Solution

The correct option is D
Newton’s first law

According to Newton's first law the spacecraft will continue moving with constant speed unless an external opposite force is applied on it.

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