# Physics help?

Mary is an avid game show fan and one of the contestants on a popular game show. She spins the wheel and after 1.5 revolutions, the wheel comes to rest on a space that has a $1,500.00 prize. If the initial angular speed of the wheel is 3.95 rad/s, find the angle through which the wheel has turned when the angular speed is 1.50 rad/s.

### 2 Answers

- oubaasLv 71 month agoFavourite answer
stopping angle = 1.5 revs = 3PI radians

3PI = Wi*t/2

stopping time t = 6PI/ Wi = PI*6/3.95 = 1.518 PI sec

angular acceleration alpha = Wi/t = 3.95*3.95/(6PI) = 0.828 rad/sec^2

3.95 -1.5 = alpha*t'

t' = 2.45/0.828 = 2.96 sec

slowing angle = Wi*t'-alpha/2*t'^2 = 8.06 rads

or

(3.95^2-1.5^2) = 2*alpha*slowing angle

slowing angle = (3.95^2-1.5^2) / (0.828*2) = 8.06 rads

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- Anonymous1 month ago
Where is the question?

- jenny1 month agoReport
idk but the final answer should be in revolutions

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