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OpenStudy (anonymous):
car travelling at 250/9 m/s on a FLAT road has a resistance force of 427N from using: R = 41.2 + 4120 sin θ + 0.156 v^2 BUT - The slope of the road through the Heysen tunnels on the South Eastern Freeway is about θ = 0.07 (radians) The speed limit is 90km/h. (25m/s) I am having trouble with answering whether the breaks need to be applied inorder to avoid car exceeding the speed limit......
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