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1. Over which interval is the velocity greatest?

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2. Over which interval(s) is the velocity zero?
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4. What is the average velocity in m/s from A to B?
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5. The velocity of an object goes from 4 m/s to 12 m/s in 4s. What is its acceleration?

For number 6 I need help describing what momentum is and how it differs from intertia.

For the rest of the problems:
1: CD
2: A
4: Not sure, either CD, or B
5: No idea.

2 answers

4. Not sure either as there is no diagram.

5. a = (vf - vi) /t

Inertia is essentially mass. Momentum is mass times velocity.
Blank between dust particles makes the planets go around the sun