SOLUTION: For a particular electric train, the tractive ‘resistance’ R at speed v km/h is given by R = 1.6 + 0.03v + 0.003v2. Find v when the tractive resistance is 10.6.

Question 1135004: For a particular electric train, the tractive ‘resistance’ R at speed v km/h is given by
R = 1.6 + 0.03v + 0.003v2. Find v when the tractive resistance is 10.6.
Answer by ikleyn(52915) (Show Source): You can put this solution on YOUR website!
.
To answer the question, you need to solve the quadratic equation

     = 10.6

Simplify it to the standard form and then solve using quadratic formula.

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