littmimi
littmimi littmimi
  • 02-10-2017
  • Physics
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I need help on both questions

I need help on both questions class=

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sportsman362
sportsman362 sportsman362
  • 02-10-2017
It's not in motion when the line straight and flat . there's #9
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hermesmousavi
hermesmousavi hermesmousavi
  • 02-10-2017
20 until 40 not moving
other with out 20 until 40 is moving
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Please help me with this!!