Question

A very long uniform helix is made of thin metal wire. The axis of helix is vertical. A small bead begins to slide down the fixed helix starting from rest. Considering friction between bead and wire of helix to be non-zero, which of the following statements is/ are true as long as bead moves on helix.

72876
expand
This question has multiple correct options
A

The speed of bead keeps on increasing.

B

The magnitude of frictional force on bead remains constant.

C

The speed of bead first increases and then remains constant.

D

The magnitude of frictional force increases and then remains constant.

Hard
Solution
verified
Verified by Toppr
Correct options are C) and D)

hint: first draw FBD of system and then applied Newton second law
step-1: draw FBD of system

step-2: apply Newton second law


step-3: conclusion of motion

Solve any question of Laws of Motion with:-
Was this answer helpful?
upvote 0
downvote0
Similar questionsstar-struck