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A car travelling 19.4m/s passes apolice car at rest.As it passes, the police car starts up, accelerating with a magnitude of 3.2m/s. Maintaining that acceleration, how long will it take the police car to catch up with the speeding motorist?

  • physics -

    t=2v/a=2•19.4/3.2=121.25 s=2.02 min

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