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**1. A cars wheels starts from rest and accelerate to 210 rpm in .73 seconds.**

a.) Find angular acceleration in radians/sec^2

b.) Find the revolutions completed in the time interval

c.) Find the total acceleration when it is 12m from the rotational axis at 180 rpm.

a.) Find angular acceleration in radians/sec^2

b.) Find the revolutions completed in the time interval

c.) Find the total acceleration when it is 12m from the rotational axis at 180 rpm.

**3. 1. a.) 210x2pi= radians/ min**

1319.47/60= 21.99 radians/sec giving omega

21.99/.73= 30.12 radians/sec^2 giving angular acceleration. I think I did this right the whole revolution thing is throwing me for a loop.

b.) I think i just plug in everything into the formula W=Wo + at? If i do that, I get 0+30.12(.73)=21.99rad/sec

Then, I have to covert back to revolutions right? So, 21.99/2pi = 3.5 revolutions? Does that sound right?

c.) I know total acceleration is Centripetal plus tangential but after that I'm completely lost. Any help would be greatly appreciate I just don't get this. =/

1319.47/60= 21.99 radians/sec giving omega

21.99/.73= 30.12 radians/sec^2 giving angular acceleration. I think I did this right the whole revolution thing is throwing me for a loop.

b.) I think i just plug in everything into the formula W=Wo + at? If i do that, I get 0+30.12(.73)=21.99rad/sec

Then, I have to covert back to revolutions right? So, 21.99/2pi = 3.5 revolutions? Does that sound right?

c.) I know total acceleration is Centripetal plus tangential but after that I'm completely lost. Any help would be greatly appreciate I just don't get this. =/

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