P. 3976. A disc of radius R is moved with a constant u velocity on an air-cushioned table. Another small disc collides with it elastically with a speed of v0=0.3 m/s, the velocities of the discs are parallel. The distance d shown in the figure is equal to R/2, friction between the discs is negligible.
a) For which u will the small disc move perpendicularly to its original motion after the collision?
b) What will be the speed of the small disc in this case?
Deadline expired on 11 May 2007.