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Problem 3) As shown in Fig. 3, a particle of mass m slides under the action of gravity inside a frictionless tube which is bent in the shape of a helix of radius r and helix angle a. The acceleration along the tangent to the path is gsin@. The particle starts from rest at time t= 0 sec from the initial position (z=a,8 - 0). a) Define your coordinate system clearly and find the acceleration vector à à - b) Find the velocity vector V c) Find the position vector 7 gsinct a O 42 g Fig. 3

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