A skater has a moment of inertia of 120kg m2 when his arms are outstretched and a moment of inertia of 65 kg m2 when his arms are tucked in close to his chest. If he starts to spin with a speed of 1.5 revolutions per second with his arms outstretched, what will his angular speed be when they are tucked in? rad/s
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 skater has a moment of inertia of 120kg m2 when his arms are outstretched and a moment of inertia of 65 kg m2 when his arms are tucked in close to his chest. If he starts to spin with a speed of 1.5 revolutions per second with his arms outstretched, what will his angular speed be when they are tucked in?
rad/s
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