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Category > Applied Sciences Posted 20 May 2017 My Price 5.00

A 1200-kg automobile is moving at a speed of 90 km/h when the brakes

A 1200-kg automobile is moving at a speed of 90 km/h when the brakes are fully applied, causing all four wheels to skid. Determine the time required to stop the automobile (a) on dry pavement (2µk = 0.75), (b) on an icy road (µk = 0.10).

 

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Status NEW Posted 20 May 2017 06:05 AM My Price 5.00

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file 1495262946-Answer.docx preview (62 words )
A----------- 12-----------00------------kg -----------aut-----------omo-----------bil-----------e i-----------s m-----------ovi-----------ng -----------at -----------a s-----------pee-----------d o-----------f 9-----------0 k-----------m/h----------- wh-----------en -----------the----------- br-----------ake-----------s a-----------re -----------ful-----------ly -----------app-----------lie-----------d, -----------cau-----------sin-----------g a-----------ll -----------fou-----------r w-----------hee-----------ls -----------to -----------ski-----------d. -----------Det-----------erm-----------ine----------- th-----------e t-----------ime----------- re-----------qui-----------red----------- to----------- st-----------op -----------the----------- au-----------tom-----------obi-----------le -----------(a)----------- on----------- dr-----------y p-----------ave-----------men-----------t (-----------2µ-----------k =----------- 0.-----------75)-----------, (-----------b) -----------on -----------an -----------icy----------- ro-----------ad -----------(µ-----------k =----------- 0.-----------10)-----------. -----------Ans-----------wer----------- m-----------=12-----------00 -----------kgg-----------=9.-----------8 -----------u=9-----------0 k-----------m/h-----------r=9-----------0*5-----------/18-----------=25----------- m/-----------s -----------a)d-----------ry -----------pav-----------eme-----------nt ----------- μ-----------=0.-----------75 ----------- en-----------erg-----------y i-----------s c-----------ons-----------erv-----------ed ----------- 1/-----------2mv-----------2-Î-----------¼mg-----------s=0----------- s-----------=42-----------.51----------- m ----------- v2------------u2-----------=2a-----------s -----------a=7-----------.35-----------1 m-----------/s2----------- t-----------=u/-----------a=2-----------5/7-----------.35-----------1=3-----------.4 -----------sec----------- b-----------)ic-----------y r-----------oad----------- Î-----------¼=0-----------.1
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