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NEET 2015 Physics and Chemistry Paper

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Question : 5

Total: 91

A plank with a box on it at one end is gradually raised about the other end. As the angle of inclination with the horizontal reaches 30∘, the box starts to slip and slides 4.0m down the plank in 4.0 s.

The coefficients of static and kinetic friction between the box and the plank will be, respectively

A 0.5 and 0.6
0.4 and 0.3
0.6 and 0.6
0.6 and 0.5

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