A bicycle has wheels of 0.8 m diameter. The bicyclist accelerates from rest with constant acceleration to 22 km/h in 13.7 s. What is the angular acceleration of the wheels?(adsbygoogle = window.adsbygoogle || []).push({});

relevant equations:

omega = omega initial + alpha * t

22km/h = 6.11m/s

I did 6.11m/s * 13.7s = 83.7207 to get the velocity

then I divided it by .4m to get 209.30175

Im not sure what I should do next

I have another question which is related to the same topic:

A block of 2kg falls with a speed of 3.9m/s from rest to a distance of 2.5m, its acc. is 3.0m/s from a pulley of radius of 8cm.

(b) What is the angular velocity of the pulley at this time?

I used V = R/omega

= 3.9m/s = .08m / omega

omega = .02

This is wrong is my approach wrong?

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Angular Acceleration of a bicycle

**Physics Forums | Science Articles, Homework Help, Discussion**