As the driver steps on the gas pedal, a car of mass1 160 kg accelerates from rest
Chapter 8, Problem 57(choose chapter or problem)
As the driver steps on the gas pedal, a car of mass1 160 kg accelerates from rest. During the first few secondsof motion, the cars acceleration increases withtime according to the expressiona 5 1.16t 2 0.210t 2 1 0.240t 3where t is in seconds and a is in m/s2. (a) What is thechange in kinetic energy of the car during the intervalfrom t 5 0 to t 5 2.50 s? (b) What is the minimum averagepower output of the engine over this time interval?(c) Why is the value in part (b) described as the minimumvalue?
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