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A long helix is made of a thin metal wire. The axis of the helix is vertical. The radius of the loops of the helix is r; and the distance between the adjacent loops is d. A small bead begins to slide down the helix. Eventually, the bead reaches a constant speed v. Find the coefficient of kinetic friction k between the bead and the helix.

 A long helix is made of a thin metal wire. The axis of the helix is vertical. The radius of the loops of the helix is r; and the distance between the adjacent loops is d. A small bead begins to slide down the helix. Eventually, the bead reaches a constant speed v. Find the coefficient of kinetic friction k between the bead and the helix.

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Grade:11

1 Answers

Shobhit Varshney IIT Roorkee
askIITians Faculty 33 Points
9 years ago
Dear student,

Loss in potential energy per helix = Work done by friction

mgd = fk m v2/r

Get fk from the above equation.

Good luck in your studies and study hard and achieve heights of success.

Thanks.


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