Question 1136817
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<pre>
25 km per hour = {{{25000/3600}}} meters per second = 6.94444... m/s.


To find angular speed, use the equation


    {{{r*alpha}}} = 6.9444.


where r = 0.45 meters is the radius of the wheel.


Then   {{{alpha}}} = {{{6.944/0.45}}} = 15.43 radians per second.     <U>ANSWER</U>


If you want to know how many full rotations is it, divide 15.43 radians by 6.28 radians :   


    {{{N[rotations]}}} = {{{15.53/6.28}}} = 2.47 full rotations.
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Answered and solved.