Answer :


Given: Let the pendulum (formed by the ball and the string) make angle θ with the vertical.


From the free-body diagram, Tcosθ − mg = 0


Tcosθ = mg


i


ma − T sin θ = 0


ma = T sin θ


. ii




So, the angle formed by the ball with the vertical is tan [ a/g.]


(ii) Let the angle of the incline be θ. From the diagram,


ma cos θ = mg sin θ





So, the angle of incline is tan (a/g)


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