The problem involves a bob of mass 0.35 kg attached to a string in a train that is accelerating. The bob is inclined at an angle of 15° to the left, and the goal is to determine the acceleration of the train, which is suggested to be 2.63 ms^-2.
The discussion is ongoing, with some participants providing guidance on drawing free body diagrams and analyzing forces. There is a mix of attempts to clarify concepts and explore different approaches, but no consensus has been reached on the solution.
Participants express uncertainty about the initial steps and the application of specific equations, indicating a need for further clarification on the concepts involved.
Right!jinhuit95 said:Weight and tension of the string!
Ask away.jinhuit95 said:Can I ask you another question over here??
Yes.jinhuit95 said:Other condition will be the upward forces = downward forces?? Am I correct??
Looks good.My working was W*0.5L cos θ = Y*L sin θ + f* L cos θ and that frictional force cause a moment too??
Doc Al said:Yes.
Looks good.
Yep.jinhuit95 said:so that means W= X+f?? And I just subt w into the above equation I did??
Don't neglect the friction force from the wall.azizlwl said:X=W
But that's not the problem being discussed here. The wall is rough.azizlwl said:Taking as No friction on the wall,
If we take moment at the base,
(L/2)WCosθ=LYSinθ
W/2=YTanθ.
Then we can proof the equation.
How can you say that?azizlwl said:With or without friction the equation still valid.