A ballerina spins initially at 1.5 revolutions/second when her arms are extended. She then draws in her arms to her body and her moment of inertia becomes 0.88 kg- and her angular speed increases to 4.0 rev/s
Determine her initial moment of inertia.
2.3 kg ? m2
You might also like to view...
Only Jupiter and Saturn have rings
a. True b. False Indicate whether the statement is true or false
From a particular location on Earth, why can we see many more total eclipses of the Moon than total eclipses of the Sun?
A) the line-up of the Earth, Moon, and Sun needed for a lunar eclipse happens many, many times more often than the line-up needed for a solar eclipse B) the Moon is much bigger in the sky than the Sun C) the Moon is always in the same place in our sky, while the Sun moves around the sky D) a total lunar eclipse is visible over a much larger part of the Earth's surface than a total solar eclipse E) you can't fool me, we always see exactly the same number of total lunar and total solar eclipses from any one location on Earth
In an inelastic collision, the initial kinetic energy is less than the final kinetic energy
Indicate whether the statement is true or false
In what part of the electromagnetic spectrum do the biggest telescopes on Earth operate?
A) visible B) ultraviolet C) radio D) X-ray E) infrared