Particle moves in a plane, and i've found that x.n=k

[jackbauer]

Hi people, could someone please help with the following:

If a particle moves in a plane, and I've found that x.n=k where n=w/|w|, then how do i go about showing that the particle moves in a circle?

A fly moves with constant speed v along the spoke of a wheel rotating with angular speed w. Starting from the center of wheel at time t=0, find it's distance at t. Show that the angle theta made between the spoke and the original direction is wt.


Any help would be welcome, cheers,
JB

 

[arildno]

Please provide explanations of your used symbols.