A smooth inclined plane of angle of inclination 30 degree is placed on the floor of a compartment of a train moving with constant acceleration a When a block is placed on the inclined plane it do not slide down or up the plane The acceleration a must be
a. g b. g/2 c. g/(root 2) d. g/(root 3)

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Answers

2015-08-02T20:04:06+05:30
N=mgcosα
It is because of mgsinα the body will have an acceleration.
mgsinα=ma
m gets cancelled.
gsinα=a
here, α=30°
gsin30°=a
g*1/2=a
g/2=a    (B)
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