Conservation of Rotational Kinetic Energy
To fully describe the momentum of a 5-kg bowling ball moving westward at 2 ms you must include information about both the magnitude and the direction of the bowling ball. Momentum is a vector quantityAs discussed in an earlier unit a vector quantity is a quantity that is fully described by both magnitude and direction. Rotational Kinetic Energy Review Article Khan Academy The fixed-axis hypothesis excludes the possibility of an axis changing its orientation and cannot describe such phenomena as wobbling or precessionAccording to Eulers rotation theorem simultaneous rotation along a number of stationary axes at the same time is impossible. . The theorem was proven by mathematician Emmy Noether in 1915 and published in 1918. It is a vector quantity possessing a magnitude and a direction. K ½mv 2. Thomas Young 17731829 derived a similar formula in 1807 although he neglected to add the ½ to the front and he didnt use the words
