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Home Q & A Board Science-Related Homework Help Physics
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mikael mikael
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10 years ago

 
A machinist turns the power on to a grinding wheel, at rest, at time t = 0 s. The wheel accelerates uniformly for 10 s and reaches the operating angular velocity of 31 rad/s. The wheel is run at that angular velocity for  27 s and then power is shut off. The wheel slows down uniformly at 1.4 rad/s2 until the wheel stops. In this situation, the average angular velocity in the time interval from t = 0 s  to t = 25 s is closest to: 
A)
 
19 rad/s 
B)
 
16 rad/s 
C)
 
14 rad/s 
D)
 
12 rad/s 
E)
 
9.3 rad/s 
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padrepadre
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10 years ago
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Anonymous
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#2
3 weeks ago
Help! The answer is missing an explanation...
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#3
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3 weeks ago
Added my formula for you
Mastering in Nutritional Biology
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