Question

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the masses of a pencil and a book are extremely compared to the mass of earth, so their gravitational fields are also very . as a result, the gravitational force between them is too to cause motion.
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Explanation:

Gravitational field strength and gravitational force depend on mass relative to other objects. A pencil and book have tiny masses compared to Earth, so their gravitational fields are weak, and the gravitational force between them is too small to produce noticeable motion.

Answer:

1. small
2. weak
3. small