Laws of MotionHard
Question
A pendulum of mass m hangs from a support fixed to a trolley. The direction of the string when the trolley rolls up a plane of inclination a with acceleration a0 is (String and bob remain fixed with respect to trolley) :
Options
A.θ = tan-1 α
B.θ = tan-1 
C.θ = tan-1 
D.θ = tan-1
Solution
T sinθ = m (g sinα + a0)
T cosθ = mg cosα
⇒ tanθ =
θ = tan-1
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