HW #1 answers(1)

If is the total student population and students know

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Unformatted text preview: student population, and students know the rumor, then not know the rumor. Therefore the DE is ( 6 pts 5. The DE is . When From this we conclude Integrating the DE, we have students do ) , we are told that the rate of change of speed is . Simplifying gives () ⁄ Solving for when gives sec. Note that only as . Therefore under this simple model the train never stops. 6 pts 6. For a vertical motion under gravity we know the DE is Integrating gives () . We are given that hit the ground when . The appropriate value fo...
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