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^{\circ}, the box starts to slip and slides 4.0 {\m} down the plank in 4.0 { s}. The coefficients of static and kinetic friction between the box and the plank will be, respectively [NEET 2015]

Correct Answer is : 0.6 and 0.5

Class 11 NEET Physics Laws of Motion Questions

Question : 21 of 76

Marks: +1, -0

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

[NEET 2015]

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

Validate

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