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mg16. A plank with a box on itat one end...

mg16. A plank with a box on itat one end is graduallyraised about the otherend. As the angle ofinclination with thehorizontal reaches 30^@, the box starts to slip andslides 4.0 m down the plank in 4.0 s. The coefficientsof static and kinetic friction between the box andthe plank will be, respectively (Take g = 10 m s?)(a) 0.5 and 0.6 (b) 0.4 and 0.3(c) 0.6 and 0.6 (d) 0.6 and 0.5

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A plank with a box on it at one end is gradually raised about the other end. As the angle of invlination with the horizontal reaches 30^@ , the box starts to slip and slides 4.0 m down the plank in 4.0s.The coefficients of static and kinetic friction between the box and the plank will be, respectively: .

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