Calculate the mass m needed in order to suspend the leg shown in (Eigure 1) . Assume the leg (with cast) has a mass of 15.5 kg , and its CG is 33.5 cm from the hip joint; the sling is 77.0 cm from the hip joint. Express your answer to three significant figures and include the appropriate units.

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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.