A rotating flywheel has moment of inertia 15.0 kg - m for an axis along the axle about which the wheel is rotating. Initially the flywheel has 30.0 J of kinetic energy. It is slowing down with an angular acceleration of magnitude 0.700 rev/s. Part A How long does it take for the rotational kinetic energy to become half its initial value, so it is 15.0 J? Express your answer to three significant figures and include the appropriate units. ? Value Units Submit Request Answer

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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.