A playground merry-go-round has a disk shaped platform that rotates with negligible friction about a vertical axis. The disk has a mass of 200kg and a radius of 1.80m. A 36.0 kg child rides at the center of the merry-go-round while a playmate sets it turning at 0.25 rev/s. If the child then walks along a radius to the outer edge of the disk, how fast will the disk be turning?
Angular speed, acceleration and displacement
Angular acceleration is defined as the rate of change in angular velocity with respect to time. It has both magnitude and direction. So, it is a vector quantity.
Angular Position
Before diving into angular position, one should understand the basics of position and its importance along with usage in day-to-day life. When one talks of position, it’s always relative with respect to some other object. For example, position of earth with respect to sun, position of school with respect to house, etc. Angular position is the rotational analogue of linear position.
A playground merry-go-round has a disk shaped
platform that rotates with negligible friction about a
vertical axis. The disk has a mass of 200kg and a
radius of 1.80m. A 36.0 kg child rides at the center
of the merry-go-round while a playmate sets it
turning at 0.25 rev/s. If the child then walks along
a radius to the outer edge of the disk, how fast will
the disk be turning?
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