Question

The upper half of an inclinded plane of inclination
O is perfectly smooth while lower half is rough. A
block starting from rest at the top of the plane will
again come to rest at the bottom, if the coefficient
of friction between the block and lower half of the
plane is given by:-
(1) u = tan
1
(2) p =
tane
(3) u =
2.
tan
(4) u = 2 tane​

Answer 1

Answer:

u=2tan

Explanation:

do it by work energy theorem....

hope it helps