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December 18, 2014

December 18, 2014

Posted by **Joey** on Wednesday, January 5, 2011 at 9:35am.

(a) What is the angular speed of the tires about their axles?

1 rad/s

(b) If the car is brought to a stop uniformly in 25.0 complete turns of the tires (without skidding), what is the magnitude of the angular acceleration of the wheels?

2 rad/s2

(c) How far does the car move during the braking?

3 m

- physics -
**Damon**, Wednesday, January 5, 2011 at 9:53amI already took this course. It is your turn to try the problems. When we see exactly what you are having trouble with perhaps we can help.

Remember

Torque = rate of change of angular momentum

= I alpha

omega = w = angular speed

angular momentum = I w

alpha = dw/dt = rate of change of w = angular acceleration

tangential speed = v = w r

distance rolled = r theta = 2 pi r*number of turns

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