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[renad-h]

6- an 8kg box is pulled over a rough floor (kinitic friction cofficient is 0.25)with a hotizaontal force F=50N if the box starts its motion from rest its speed after 2 sec is
answer(7.6m/s)
7- a 5kg box is pulled up an inclined plan angle =30with horicontal force F=50 N if the box move eith constant speed what is the coefficient of kinetic friction
answer(0.27)
8-an 80 kg box is affected ny force of 500N with angle 40 with the horizonal if the box start its motion from rest and covered8m in 2 sec what iscoefficient of kinetic friction
answer(0.14 )
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