Power output vs time graph for a 2100 kg car starting from rest is given below .35% of the power output is lost due friction, find the speed of the car at t =18 s.

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A: Given, initial velocity =20.0 m/s mass of baseball =0.145 kg

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Q: Just need #7, but need values from #6.

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A: According to conservation of momentum principle,’ Iiωi=Ifωf Thus, 25MRi2ωi=25MRj2ωfRi2ωi=Rf2ωf  

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