A box of mass 9kg is placed on a rough inclined plane of inclination θ. Its downward motion can be prevented by applying an upward pull of 20N and it can be made to slide upwards by applying a force 40N. The coefficient of friction between the box and the inclined plane is
see full answer
Your Exam Success, Personally Taken Care Of
1:1 expert mentors customize learning to your strength and weaknesses – so you score higher in school , IIT JEE and NEET entrance exams.
An Intiative by Sri Chaitanya
a
13tanθ
b
3tanθ
c
12tanθ
d
2tanθ
answer is A.
(Unlock A.I Detailed Solution for FREE)
Best Courses for You
JEE
NEET
Foundation JEE
Foundation NEET
CBSE
Detailed Solution
Force required to prevent slidingmg(sinθ−μcosθ)=20N→(1)Force required to move up mg(sinθ+μcosθ)=40N→(2)Solving (1) & (2) μ=13tanθ
A box of mass 9kg is placed on a rough inclined plane of inclination θ. Its downward motion can be prevented by applying an upward pull of 20N and it can be made to slide upwards by applying a force 40N. The coefficient of friction between the box and the inclined plane is