A bead slides starting from rest at position B on a frictionless wire bent in th

Question

A bead slides starting from rest at position B on a frictionless wire bent in the shape shown in the figure. The direction of the gravitational field is in the -y direction (toward the bottom of the page). (Select T-True, F-False, G-Greater than, L-Less than, E-Equal to. If the first is T, the second G, and the rest F, enter TGFFFF). The acceleration in the x-direction at D is ... zero. The acceleration in the y-direction at D is ... zero. The speed at H is ... the speed at A. The acceleration at H is zero. The speed at Cis ... the speed at H. The velocity at H equals the velocity at A

Explanation / Answer

A) True - The bead is moving horizontally at constant speed at D

B) False - The bead is being accelerated towards the center of rotation

C) True - Energy is conserved and the PE at H = the PE at C

                PE + KE = constant

D) False - same reasoning as for (B)

E) False - the bead is slowing as it slides upwards on the wire

F) False - The speed is the same (C) but the direction is different

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