## BBB

BBB Better Business Bureau

## BBB

abbreviation

Better Business Bureau

- Instantaneous Axis of a Cylinder rolling on a Cylinder.Let a cylinder
**bbb**, whose axis of figure is B and angular velocity -y, roll on a fixed cylinder acm, whose axis of figure is A, either outside (as infig. - The line T on the surface
**bbb**has for the instant no velocity it a direction perpendicular to AB; becau2e for the instant it touches, without sliding, the line T on the fixed surface aaa. - The line T on the surface
**bbb**has also for the instant no velocity in the plane AB; for it has just ceased to move towards the fixed surface aaa, and is just about to begin to move away from that surface. - The line of contact T, therefore, on the surface of the cylinder
**bbb**, is for the instant at rest, and is the instantaneous axis FIG. - About which the cylinder
**bbb**turns, together with any body rigidly attached to that cylinder.

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