Q. 4

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Found in: Page 330

### Physics for Scientists and Engineers: A Strategic Approach with Modern Physics

Book edition 4th
Author(s) Randall D. Knight
Pages 1240 pages
ISBN 9780133942651

# An 18-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 60rpm to 90 rpm in 10s .a. What is the tangential acceleration of the pedal?b. What length of chain passes over the top of the sprocket during this interval?

a. the tangential acceleration of the pedal is

b. the length of chain passes over the top of the sprocket during this interval is

See the step by step solution

## Part (a)

The initial and final angular velocity, 60 and 90 rpm respectively, the time period for this change of velocity, 10 seconds, and a

The radius of the crank arm,

Tangential acceleration

## Part (b)

The initial and final angular velocity

Angle turned by the bicycle crank in

If the length of chain passes over the top of sprocket