http://s7.postimg.org/rbs1xqgrv/13_2.gif This is the position vs. time graph for

Question

http://s7.postimg.org/rbs1xqgrv/13_2.gif

This is the position vs. time graph for a mass on a spring. What can you say about the velocity and the net force at the instant indicated by the dotted line?
Velocity zero; force toward +x
Velocity positive; force toward -x
Velocity negative; force toward +x
Velocity zero; force toward -x
None of the above

This is the position vs. time graph for a mass on a spring. What can you say about the velocity and the net force at the instant indicated by the dotted line?

Explanation / Answer

Velocity zero; force toward +x

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