Questions
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 4.0 m down the plank in 4.0 s. The coefficients of static and kinetic friction between the box and the plank will be, respectively :
detailed solution
Correct option is C
Coefficient of static friction,μs=tan30∘=13=0.6a=gsin30∘−μkgcos30∘S=ut+12at2⇒4=12g2−μkg32×16⇒μk=0.5Talk to our academic expert!
Similar Questions
Two blocks of mass M and m are connected with a string which passes over a smooth pulley as shown in fig. The mass M is placed on a rough
inclined plane. The coefficient of friction between the block and the inclined plane is µ. What should be the minimum mass m so that the block M slides upward ?
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