Blog categorized as NLM

Q- A bead slides down along a frictionless stiff wire of length L which is bent in form of a serpentine coil of length L/2 and placed vertically as in figure. What is the slide time to reach the ground? The gap between the turns is much less than the length of the wire.

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Q- A solid cylinder, of radius c acted upon by no forces, moves parallel to its axis through a uniform cloud of fine dust, of volume density ρ, which is at rest. If the particles of dust which meet the cylinder adhere to it, and if m0 and u be the mass and the velocity at the beginning of the motion...