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A centripetal-acceleration addict rides in uniform circular motion with period T = 3.39 s and radius r = 3.00?
what is velocity dot acceleration (dot product of the two vectors)
and what is radius cross acceleration (cross product of the two vectors)
i dont get it...
thanks!
1 Answer
- Andrew SmithLv 77 years agoFavorite Answer
The velocity is always tangential, and the acceleration is always directed to the centre of the circle.
As the angle between these two is 90 degrees then the dot product ( V*a* cos(theta) ) must be zero.
The acceleration is radial ie in the same direction as the radius.
A cross product is given by A*R * sin(theta) ie it is a maximum when the two are at right angles and zero when the two vectors are in the same direction the cross product must be zero.
