A bead slides on a wire, which is in a vertical plane, as shown in the diagram.

Question

A bead slides on a wire, which is in a vertical plane, as shown in the diagram. Gravity acts in the -y direction. The bead starts at A, moving to the right with an initial velocity v. The wire is frictionless between A and D and between F and G, but there is friction between D and F. (For each statement select True, False, Greater than, Less than, Equal to, or Not enough information to tell.)

a) __________________ The bead's potential energy at B is ... its potential energy at F

b)__________________  Between A and B, the speed increases

c)_____________________ The speed at C is ... the speed at E

d)_______________________ The total energy of the bead at B is ... the total energy at D  

Explanation / Answer

a) True.

As both b and f poin are at same height both have hame potential energy.

b) True.

Here potential energy at A is converted into kinetic energy at B.

c) Not enough information to tell.

Friction is unknown between D and F

d) True.

There is no friction between B and D.

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