An 16-cm-long bicycle crank arm, with a pedal at one end, is attached to a 24-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 11 s .
What is the tangential acceleration of the pedal?
What length of chain passes over the top of the sprocket during this interval?
given that
l = 0.18 m
diameter d = 0.24 m
radius r = d/2 = 0.12 m
initial angular speed w1 = 62 rpm = 62*2*3.14/60 = 6.49 rad/s
final angular speed w2 = 92*2*3.14/60 = 9.63 rad/s
angular acceleration = w2-w1/t = (9.63-6.49)/11 = 0.285 rad/s^2
a) tangential acceleration a = l*angular acceleration = 0.16*0.285 = 0.0456 m/s^2
b) angular displacement = (w2^2-w1^2)/2*angualr acceleration = (9.63^2-6.49^2)/2*0.285 = 88.8 rad
length of chain = 0.12*88.8 = 10.6 m
An 16-cm-long bicycle crank arm, with a pedal at one end, is attached to a 24-cm-diameter...
An 15-cm-long bicycle crank arm, with a pedal at one end, is attached to a 21-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 10 s. What is the tangential acceleration of the pedal? What length of chain passes over the top of the sprocket during this interval?
An 15-cm-long bicycle crank arm, with a pedal at one end, is attached to a 21-cm-diameter sprocket, the toothed disk around which the chain moves. A cyclist riding this bike increases her pedaling rate from 64 to 95 in 10 s грm грm What is the tangential acceleration of the pedal? What length of chain passes over the top of the sprocket during this interval?
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Read the article, more specifically the abstract,
introduction, discussion and conlcusion and summarize those
specific sections in a paragraph or two.
INTRODUCTION
With the increase in recreational and competitive cycling,
cyclists are experiencing more overuse inju- ries related to
repetitive loading.Both intrinsic and extrinsic factors contribute
to injury. Intrinsic fac- tors are inherent to the cyclist and
include fitness level as well as anatomical alignment of the lower
extremities. Extrinsic factors are generally asso- ciated with
factors external to the...