Supposethatyouwerecalleduponto givesomeadviceto a lawyerconcerningthephysicsinvolvedinoneof hercases Thequestioniswhetheradriverwasexceedinga30-mi/h speedlimitbeforehe madean emergencystop, brakeslocked and wheelssliding.Thelengthof skidmarkson the roadwas 19.2 ft. The policeofficer madethe assumptionthat the maxi mumdecelerationofthecarwouldnotexceedtheaccelerationof a freelyfallingbody(= 32 ft/s2)and did notgive the drivera ticket.Was the driverspeeding?Explain.

Hrishant Goswami , 9 Years ago

Grade 10