# Angular problems

1. Sep 3, 2008

### fate119

Hey guys I need some help with these problems.

An automobile tire has a radius of 0.344 m, and its center moves forward with a linear speed of v = 19.2 m/s. (a) Determine the angular speed of the wheel. (b) Relative to the axle, what is the tangential speed of a point located 0.104 m from the axle?

A person is riding a bicycle, and its wheels have an angular velocity of 14.5 rad/s. Then, the brakes are applied and the bike is brought to a uniform stop. During braking, the angular displacement of each wheel is 11.5 revolutions. (a) How much time does it take for the bike to come to rest? (b) What is the angular acceleration (in rad/s2) of each wheel?

2. Sep 3, 2008

### Hootenanny

Staff Emeritus
Welcome to PF fate119,

For future reference we have Homework Help forums for dedicated homework assistance, don't worry about re-posting your question there, it'll be moved by a mentor shortly.

Secondly, when asking for help with your homework you are expect to detail your attempt at a solution, or at least outline your thoughts on the problem; if we don't know how much you know, we can't help you.