Problem 12.4 An 20-cm-long bicycle crank arm, with a pedal at one end, is attached to a 25-cm-diameter sprocket, the toothed disk around which the chain moves. A cyclist riding this bike increases her pedaling rate from 64 rpm to 95 rpm in 12 s Part A What is the tangential acceleration of the pedal? Express your answer to two significant figures and include the appropriate units. at = Value Units Submit Request Answer Part B What length of chain passes over the top of the sprocket during this interval? Express your answer to two significant figures and include the appropriate units. HẢ Value Units Submil Reguost Ancr

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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.