hii cud u plz solve this question............

 

 

a plumb bob of mass 1 kg is hung from the ceiling of a train compartment. the train moves on a inclined plane with an acceleration of a= g/2. if the angle of incline is 30⁰ .find the angle made by the string with the normal to the ceiling and also find the tension on the string..

ANS= tan^-1(2/3) , 57 N.

 

i tied to solve by resolving the two forces acting on the point which suspends teh bob but im not getting the answer.. cud sum1 plz help..