2) An 16-cm-long bicycle crank arm, with a pedal at one end, is attached to a 20-cm-diameter sprocket, the toothed disk

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2) An 16-cm-long bicycle crank arm, with a pedal at one end, is
attached to a 20-cm-diameter sprocket, the toothed disk around
which the chain moves. A cyclist riding this bike increases her
pedaling rate from 62 rpm to 92 rpm in 10 s. Assume constant
angular acceleration. a) What is the tangential acceleration of the
pedal? Express your answer to two significant figures
and include the appropriate units. 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.