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Homework Help
Introductory Physics Homework Help
Friction and Energy Conversion
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[QUOTE="alison16, post: 4947530, member: 530592"] [h2]Homework Statement [/h2] A 1100kg car is traveling at 24m/s before it hits a 18m patch of mud with a 1.7 x 10^4 net horizontal resistive force. What is the cars speed as it leaves the mud patch? [h2]Homework Equations[/h2] Change in Uint= fd KE= 1/2mv^2 W= Fd [h2]The Attempt at a Solution[/h2] 1/2mv^2 = f(mud on car)d 1/2(1100)v^2 = 1.7 x 10^4(18) V= 23.6 m/s I'm pretty sure this isn't correct, because the resistive force is too great to have the final velocity change only slightly. I feel like I might need to incorporate work or the initial velocity into my equation, but I don't really know how. [/QUOTE]
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